an aluminum foil manufacturer wants to improve the quality of his product and is trying to develop a probability model for the flaws that occur in a sheet of foil. assume that x, the number of flaws per square foot, has a poisson distribution. if flaws occur randomly at an average of one flaw per 40 square feet, what is the probability that a box containing a 120 square foot roll will contain more than one flaw? round your answer to four decimal places, if necessary.

Answers

Answer 1

The probability that a 120 square foot roll will contain more than one flaw is approximately 0.0001, or 0.01%.

The number of flaws per square foot, denoted by X, as a Poisson distribution with parameter lambda = 1/40 (since there is an average of one flaw per 40 square feet).

To find the probability that a 120 square foot roll will contain more than one flaw, we need to calculate the probability of X > 1, where X is Poisson distributed with parameter lambda = 1/40.

Using the Poisson distribution formula, we have:

[tex]P(X > 1) = 1 - P(X < = 1)[/tex]

= [tex]1 - [P(X = 0) + P(X = 1)][/tex]

We can calculate P(X = 0) and P(X = 1) using the Poisson distribution formula:

P(X = k) = (e^(-lambda) * lambda^k) / k!

where k is the number of flaws and lambda = 1/40.

[tex]P(X = 0) = (e^(-1/40) * (1/40)^0) / 0! = e^(-1/40) = 0.9756[/tex]

[tex]P(X = 1) = (e^(-1/40) * (1/40)^1) / 1! = (1/40) * e^(-1/40) = 0.0244[/tex]

[tex]P(X > 1) = 1 - [P(X = 0) + P(X = 1)][/tex]

[tex]= 1 - (0.9756 + 0.0244)[/tex]

[tex]= 0.0001[/tex]

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Related Questions

Pinocchio’s nose is 9cm long. If he lies, his nose grows by 6cm. If he tells the truth, it shortens by 2cm. He tells a lie 4 times, and the truth twice. How long is Pinocchio’s nose now?

Answers

Answer:

29 cm

Step-by-step explanation:

We Know

Pinocchio’s nose is 9cm long.

His nose grows by 6cm if he lies.

His nose shortens by 2cm if he tells the truth.

He lies 4 times and truth 2 times.

We Take

9 + (6 x 4) - (2 x 2) = 29 cm

So, Pinocchio's nose now is 29 cm.

Answer:

29 cm

Step-by-step explanation:

(6x4) + 9

(6x4) = 24 cm

24 + 9 = 33 cm

(2x2) - 33

(2x2) = 4 cm

4 - 33 = 29 cm

I hope this helps!

laptop: $199.99, 13% markup what is the markup

Answers

Answer:

≈ $26

Step-by-step explanation:

13% = 0.13

199.99 x 0.13 = $25.9987

So, 13% markup is ≈ $26

Markup = $25.9987
First you find the percent of the money given.
13/100 = 0.13
Do 0.13 (199.99) and you will get your markup answer,

If you are in the need of selling price too, please reply to the comment for that and I will try my best to give you the right answer. Hope this helps you :)

The measure of angle G is 20° what fraction of a complete circle is the measure of angle G

Answers

The angle G is (1/18) th {or (20/360)th } fraction of complete circle.

The angle G is measured to be 20°.

We know, the total angle of a complete circle is 360°.

Thus, by simple fraction we can say,

The angle G fraction of complete circle is = 20° / 360°

Simplifying we get, the angle G fraction of complete circle is = 1/18

Hence the angle G is (1/18 )th fraction of a complete circle.

In mathematical term, fractions are defined as a part of the whole. In other words, fraction is referred to the ratio of the value observing to the whole set of values.

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we have studied srs and stratified sampling, and have also mentioned cluster sampling. there is one more sampling method which arises frequently, called systematic sampling. this is how it works in its simplest form:

Answers

Systematic sampling is a type of probability sampling method where every nth item in a population is selected for inclusion in the sample.

For example, if a researcher wanted to select a systematic sample of 100 students from a school population of 1,000 students, they would randomly select one of the first 10 students (1/10th of the population) and then select every 10th student thereafter until they reach 100. Systematic sampling is often used when the population is too large to enumerate and it is more efficient than simple random sampling. However, it is important to ensure that the sampling interval is not biased in any way, otherwise the sample may not be representative of the population.

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Systematic sampling is a relatively easy and quick method of sampling, as it requires less effort and time than other methods such as stratified or cluster sampling.

The starting point is truly random, and that the interval selected does not create any bias in the sample.

Systematic sampling is a method of selecting a sample from a population using a system or a pattern.

It involves selecting every nth item or person from the population after a random starting point has been determined.

To perform systematic sampling, the first item or individual in the sample is randomly selected from the population.

Then, the remaining items or individuals are selected at regular intervals, such as every 10th or 20th item or individual.

The interval is calculated by dividing the population size by the desired sample size.

A researcher wants to select a sample of 100 from a population of 1000, the interval would be. [tex]1000/100 = 10.[/tex]

The researcher would randomly select the first item or individual from the population, and then select every 10th item or individual thereafter until the desired sample size is reached.

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x 3 + 3 x 2 − x + 2 x 2 + 6 x − 2

Answers

Answer: If you want me to evaluate its 18x - 2

Hope it helped :D

i’m stuck on how to work this out , please help.

Answers

The value of x in the expression is 3 / 2.

How to find the quotient in an expression?

The value of x in the expression can be found as follows:

Therefore, the quotient rule can be used to find the value of quotient x in the expression as follows:

q⁵ × q²ˣ = q¹⁰ ×  q⁶ / q⁸

Using the quotient rule

[tex]A^{x} X A^{y} = A^{x + y}[/tex]

Therefore,

q⁵ × q²ˣ = q¹⁰ ×  q⁶ / q⁸

q⁵⁺²ˣ = q¹⁶ / q⁸

q⁵⁺²ˣ = q⁸

cancel the base

5 + 2x = 8

2x = 8 - 5

2x = 3

divide both sides of the equation by 2

x = 3 / 2

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shuffle a deck of cards and t urn over t he first card. \i\fhat is t he sample space of t his experiment? how many outcomes are in t he event t hat t he first card is a heart?

Answers

If we shuffle a deck of cards ,turn over first card, then

(a) "Sample-Space" of this experiment is set of all 52 cards.

(b) Number of outcomes in event that the first card is a heart is 13 .

Part (a) : The "Sample-Space" of this experiment refers to all possible outcomes that occur when "first-card" from a shuffled deck of cards is turned over.

In a "standard-deck" of 52 playing cards, the sample space consist of all 52 cards, which includes 4 suits (hearts, diamonds, clubs, spades) each with 13 cards (Ace - 10, Jack, Queen, King).

So, the sample space of this experiment will be set of all 52 possible cards that could be turned over as "first-card".

Part (b) : The event that "first-card" is a heart will consist of all outcomes where the first card turned over is a heart.

In a "standard-deck" of 52 "playing-cards", there are 13 hearts (Ace of Hearts, 2 of Hearts, 3 of Hearts, ..., 10 of Hearts, Jack of Hearts, Queen of Hearts, and King of Hearts).

Therefore, there are 13 outcomes in the event .

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The given question is incomplete, the complete question is

Shuffle a deck of cards and turn over the first card.

(a) What is the sample space of this experiment?

(b) How many outcomes are in the event that the first card is a heart?

T/F There exists a function f such that f(x) > 0, f'(x) < 0, and f"(x) > 0 for all x.

Answers

True, there exists a function f such that f(x) > 0, f'(x) < 0, and f"(x) > 0 for all x.

An example of such a function is[tex]f(x) = e^(-x)[/tex], where e is the base of the natural logarithm (approximately 2.718).

Let's verify the given conditions:

f(x) > 0:

Since e^(ax) is always positive for any real value of x and any constant a, [tex]e^(-x)[/tex]is also always positive for any real value of x.

f'(x) < 0:

To find the first derivative, apply the chain rule: [tex]f'(x) = -e^(-x). As e^(-x)[/tex] is always positive, the derivative

[tex]f'(x) = -e^(-x)[/tex] is  always negative for all x.

f"(x) > 0:

To find the second derivative, apply the chain rule again:

[tex]f"(x) = e^(-x). As e^(-x)[/tex]is always positive, the second derivative[tex]f"(x) = e^(-x)[/tex] is always positive for all x.

Thus, it is true that there exists a function f with the given conditions.

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The function [tex]f(x) = e^(-x)[/tex] meets all the given conditions.

True. There exists a function f such that [tex]f(x) > 0, f'(x) < 0, and f"(x) > 0[/tex] for all x. One example of such a function is [tex]f(x) = e^(-x)[/tex].
True. There exists a function f(x) that satisfies the given conditions: f(x) > 0, f'(x) < 0, and f''(x) > 0 for all x.

Consider the function [tex]f(x) = e^(-x)[/tex]. This function has the following properties:

1. f(x) > 0 for all x because the exponential function is always positive.
2. [tex]f'(x) = -e^(-x)[/tex]which is always negative because e^(-x) is always positive, and the negative sign in front makes the derivative negative.
3. [tex]f''(x) = e^(-x)[/tex]which is always positive.

Thus, the function [tex]f(x) = e^(-x)[/tex]meets all the given conditions.

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Question 5
A recent conference had 900 people in attendance. In one exhibit room of 80 people, there were 65 teachers and 15 principals. What prediction can you make about the number of principals in attendance at the conference?

There were about 820 principals in attendance.
There were about 731 principals in attendance.
There were about 208 principals in attendance.
There were about 169 principals in attendance.

Question 6
A teacher was interested in the subject that students preferred in a particular school. He gathered data from a random sample of 100 students in the school and wanted to create an appropriate graphical representation for the data.

Which graphical representation would be best for his data?

Stem-and-leaf plot
Histogram
Circle graph
Box plot

Question 7
A random sample of 100 middle schoolers were asked about their favorite sport. The following data was collected from the students.
Sport Basketball Baseball Soccer Tennis
Number of Students 17 12 27 44
Which of the following graphs correctly displays the data?
histogram with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled basketball going to a value of 17, the second bar labeled baseball going to a value of 12, the third bar labeled soccer going to a value of 27, and the fourth bar labeled tennis going to a value of 44
histogram with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled baseball going to a value of 17, the second bar labeled basketball going to a value of 12, the third bar labeled tennis going to a value of 27, and the fourth bar labeled soccer going to a value of 44
bar graph with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled basketball going to a value of 17, the second bar labeled baseball going to a value of 12, the third bar labeled soccer going to a value of 27, and the fourth bar labeled tennis going to a value of 44
bar graph with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled baseball going to a value of 17, the second bar labeled basketball going to a value of 12, the third bar labeled tennis going to a value of 27, and the fourth bar labeled soccer going to a value of 44

Question 8
A New York City hotel surveyed its visitors to determine which type of transportation they used to get around the city. The hotel created a table of the data it gathered.


Type of Transportation Number of Visitors
Walk 120
Bicycle 24
Car Service 45
Bus 30
Subway 81


Which of the following circle graphs correctly represents the data in the table?
circle graph titled New York City visitor's transportation, with five sections labeled walk 80 percent, bus 16 percent, car service 30 percent, bicycle 20 percent, and subway 54 percent
circle graph titled New York City visitor's transportation, with five sections labeled walk 40 percent, bicycle 8 percent, car service 15 percent, bus 10 percent, and subway 27 percent
circle graph titled New York City visitor's transportation, with five sections labeled subway 40 percent, bus 8 percent, car service 15 percent, bicycle 10 percent, and walk 27 percent
circle graph titled New York City visitor's transportation, with five sections labeled subway 80 percent, bicycle 20 percent, car service 30 percent, bus 16 percent, and walk 54 percent

Question 9
A college cafeteria is looking for a new dessert to offer its 4,000 students. The table shows the preference of 225 students.


Ice Cream Candy Cake Pie Cookies
81 9 72 36 27


Which statement is the best prediction about the scoops of ice cream the college will need?
The college will have about 480 students who prefer ice cream.
The college will have about 640 students who prefer ice cream.
The college will have about 1,280 students who prefer ice cream.
The college will have about 1,440 students who prefer ice cream.

Question 10
The box plots display measures from data collected when 20 people were asked about their wait time at a drive-thru restaurant window.

A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 8.5 to 15.5 on the number line. A line in the box is at 12. The lines outside the box end at 3 and 27. The graph is titled Super Fast Food.

A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 9.5 to 24 on the number line. A line in the box is at 15.5. The lines outside the box end at 2 and 30. The graph is titled Burger Quick.

Which drive-thru typically has more wait time, and why?

Burger Quick, because it has a larger median
Burger Quick, because it has a larger mean
Super Fast Food, because it has a larger median
Super Fast Food, because it has a larger mean

Answers

Answer:

B

B

A

B

D

C

Step-by-step explanation:

5. B

65 = teachers

15 = principal

65/80 = 81.25

If there's is a total of 900 people, find 81.25 (number of teachers)

=731.25

=731

6. B

The best graphical representation for the teacher's data would be a histogram. A histogram is a graph that displays the distribution of continuous data, such as the number of students who prefer a particular subject. It shows the frequency of each interval, or bin, of values.

A stem-and-leaf plot is typically used for small datasets and displays each data point. A circle graph, also known as a pie chart, is used to show how different parts make up a whole and is not appropriate for showing the distribution of preferences among the students. A box plot, also known as a box-and-whisker plot, is used to display the distribution of data, but it may not be as useful for showing the specific frequencies of each preference as a histogram would be.

7) A

There's an image for it I attached

8) B

The correct circle graph that represents the data in the table is option B) circle graph titled New York City visitor's transportation, with five sections labeled walk 40 percent, bicycle 8 percent, car service 15 percent, bus 10 percent, and subway 27 percent.

In the given table, the number of visitors for each type of transportation is given. To create a circle graph, we need to convert the given numbers to percentages. Then, we can use these percentages to determine the angle of each section in the circle graph.

Using the given numbers, we can calculate the percentage of visitors for each transportation type as follows:

Walk: (120/300) x 100 = 40%

Bicycle: (24/300) x 100 = 8%

Car Service: (45/300) x 100 = 15%

Bus: (30/300) x 100 = 10%

Subway: (81/300) x 100 = 27%

Option B) correctly represents these percentages in a circle graph.

9) D

The best prediction about the scoops of ice cream the college will need is option D) The college will have about 1,440 students who prefer ice cream.

To make this prediction, we need to use the information given in the table and assume that the entire student body has the same preferences as the sample of 225 students.

According to the table, 81 out of 225 students prefer ice cream.

To estimate the number of students who prefer ice cream in the entire student body of 4,000 students, we can use proportions.

81/225 = x/4000

Multiplying both sides by 4000, we get:x = 81/225 x 4000 = 1,440

Therefore, the college will have about 1,440 students who prefer ice cream, and they will need to prepare that many scoops.

10) C

The drive-thru that typically has more wait time is option C) Super Fast Food, because it has a larger median.

The median is the middle value when a set of data is arranged in order. In this case, the median wait time for Super Fast Food is 12 minutes, and the median wait time for Burger Quick is 15.5 minutes.

This means that half of the customers at Super Fast Food waited less than 12 minutes, while half of the customers at Burger Quick waited less than 15.5 minutes.

Therefore, the wait time at Super Fast Food is typically shorter than at Burger Quick.

The mean, on the other hand, is influenced by outliers or extreme values, and it is not as robust a measure of central tendency as the median. Therefore, we cannot determine which drive-thru typically has more wait time based on the mean alone.

A 36-oz bottle of water costs $2. 88.

What is the cost per ounce?

Answers

If a 36-oz bottle of water costs $2. 88, then the cost per ounce is $0.08

Unitary method is a mathematical method used to find the value of a single unit of a quantity, by dividing the total value of the quantity by the number of units.

To find the cost per ounce, we can use the unitary method which involves dividing the total cost by the total number of ounces:

Cost per ounce = Total cost ÷ Total ounces

Total cost of a 36-oz bottle of water = $2.88

Total ounces in a 36-oz bottle of water = 36 oz

Therefore, the cost per ounce of water can be calculated as

Cost per ounce = $2.88 ÷ 36 oz

Cost per ounce = $0.08 per ounce

So the cost per ounce of water is $0.08

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Rewrite in simplest terms: − 0. 4 ( − 6 g − 9 h ) − 2 h − 0. 2 ( − 5 h + 3 g ) −0. 4(−6g−9h)−2h−0. 2(−5h+3g)

Answers

The value of the given expression -0.4( -6g - 9h ) - 2h - 0.2( -5h + 3g ) in the simplest form  is equal to  1.8g + 2.6h.

The expression is equal to,

-0.4( -6g - 9h ) - 2h - 0.2( -5h + 3g )

Apply distributive law multiplication over addition.

A ( B + C ) = A × B + A × C

Simplify the expression by first distributing the -0.4 and -0.2 coefficients to the terms inside the parentheses,

= (-0.4 × -6g  + 0.4 × 9h ) -2h - ( 0.2 × -5h  + 0.2 × 3g )

= 2.4g + 3.6h - 2h + h - 0.6g

Combine like terms,

= (2.4g - 0.6g) + (3.6h - 2h + h)

= 1.8g + 2.6h

Therefore, the simplest form of the expression is 1.8g + 2.6h.

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The above question is incomplete, the complete question is:

Rewrite in simplest terms:

− 0. 4 ( − 6 g − 9 h ) − 2 h − 0. 2 ( − 5 h + 3 g )

What is the common differences for
3, 7, 11, 15, 19, 23

Answers

Step-by-step explanation:

Each term goes UP by 4 from the one before it

 common difference,   d = 4

The angle of elevation from point A to the top of a hill is 49°. If point A is 400 feet from the base of the hill, how high is the hill? Round to the nearest tenth.

1. 460.1 ft
2. 301.9 ft
3. 262.4 ft
4. 459.3 ft

Answers

To solve this problem, we can use trigonometry. The tangent of the angle of elevation is equal to the height of the hill divided by the distance from point A to the base of the hill. So:

tan(49°) = height/400

height = 400 * tan(49°) = 459.3 ft (rounded to the nearest tenth)

Therefore, the answer is option 4) 459.3 ft

act scores have a mean of 21.4 and 15 percent of the scores are above 26 . the scores have a distribution that is approximately normal. find the standard deviation. round your answer to the nearest tenth, if necessary.

Answers

The standard deviation of the ACT scores is approximately 4.2.

What is Standard deviation?

Standard deviation is a measure of the amount of variation or dispersion in a set of data values. It indicates how much the data values deviate, on average, from the mean (or average) of the data set. A higher standard deviation indicates greater variability or spread in the data, while a lower standard deviation indicates less variability or spread.

According to the given information:

To find the standard deviation of ACT scores, we can use the given information about the mean and the percentage of scores above a certain threshold.

Given:

Mean (μ) = 21.4

Percentage of scores above 26 = 15%

Since the distribution is approximately normal, we can use the Z-score formula to find the Z-score corresponding to the given percentage. The Z-score is the number of standard deviations a particular value is from the mean in a normal distribution.

Z-score formula:

Z = (X - μ) / σ

Where:

Z = Z-score

X = Value (in this case, 26)

μ = Mean (21.4)

σ = Standard deviation (to be found)

We can rearrange the formula to solve for σ:

σ = (X - μ) / Z

Substituting the given values:

X = 26

μ = 21.4

Z = Z-score corresponding to 15% (which can be found using a standard normal distribution table or a Z-score calculator)

Assuming a standard normal distribution table or calculator gives us a Z-score of approximately 1.04 for a percentage of 15%, we can plug in the values:

σ = (26 - 21.4) / 1.04

σ = 4.4 / 1.04

σ ≈ 4.2 (rounded to the nearest tenth)

So, the standard deviation of the ACT scores is approximately 4.2.

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The function y = f(x) is graphed below.
What is the average rate of change of the
function f(x) on the interval
-1 ≤ x ≤ 0?

Answers

Answer:

-2

Step-by-step explanation:

The explanation is in the picture

What is the sine ratio for angle A?

A. 5/4
B. 4/5
C. 3/4
D. 3/5

Answers

The sine ratio of for angle A is 4/5 and the right option is B. 4/5.

What is sine ratio?

Sine ratio is the ratio of the length of the opposite side divided by the length of the hypotenuse.

The formula for the sine ratio of angle A is given in the formula below

Formula:

SinA = Opposite/Hypotenus................. Equation 1

From the diagram.

Given:

Opposite = 4Hypotenus = 5

Substitute these values into equation 1

SinA = 4/5

Hence, the right option is B. 4/5.

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The radius of a circle is 3 centimeters. What is the length of a 45° arc?

Answers

Answer:

2.36 miles

Step-by-step explanation:

radius, r = 3 miles∅ = 45°Length of an arc = ∅/360 * 2πr= 45/360 * 2 * 3.14 * 3= 2.36 miles

bertha is stacking oranges in the form of a pyramid. the base is a rectangle that is four oranges by six oranges. each orange above the base rests on 4 oranges below it. how many oranges are used

Answers

The total number of oranges used in Bertha's pyramid is 24 + 6 + 2 + 1 = 33 oranges.

To calculate how many oranges are used in Bertha's pyramid, we first need to find out how many oranges are in each

layer of the pyramid. Since the base of the pyramid is a rectangle that is 4 oranges by 6 oranges, there are a total of 4 x 6 = 24 oranges in the base layer.

For the second layer of the pyramid, each orange rests on 4 oranges below it.

Since the base layer has 24 oranges, there will be 24 / 4 = 6 oranges in the second layer.

For the third layer, each orange again rests on 4 oranges below it.

So there will be 6 / 4 = 1.5 oranges in the third layer.

Since we cannot have half an orange, we round up to 2 oranges.

Finally, the top layer of the pyramid will consist of a single orange.

Therefore, the total number of oranges used in Bertha's pyramid is 24 + 6 + 2 + 1 = 33 oranges.

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a family will rent a picnic shelter for $200 for a reunion. the cost of the shelter will be distributed equally among the people who plan to attend. the current cost per person will decrease by $1 if 10 more people plan to attend the reunion. how many people are currently planning to attend the reunion

Answers

Answer:

40 people are currently planning to attend the reunion.

Step-by-step explanation:

If we don't know how many people are coming, we can call that number x.

If those people split the cost ($200) it will be 200/x.

If 10 more people come, the head count is now x+10.

So the cost becomes 200/(x+10)

The cost when more people pitch in is less money per person. If fewer people split the cost its more per person. They are saying the difference here is $1.

So we can write an equation.

200/x = 200/(x+10) + 1

OR

200/x - 1 = 200/(x+10)

Cross multiply. This gives you a quadratic equation so factor to solve or use Quadratic Formula. See image. It shows how to solve by factoring.

see images. There are 2 images.

can someone help me asap? It’s due today

Answers

The type of sampling the principal can use is systematic sampling.

What is systematic sampling?

Sampling means selecting the group that you will actually collect data from in your research. For example, if you are researching the opinions of students in a university, you could survey a sample of 50 students.

Systematic sampling is a probability sampling method where researchers select members of the population at a regular interval.

Therefore , with the definition of systematic sampling, it is best for the principal to use a method of systematic sampling for the procedure.

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A clinical trial is performed to test a new drug designed to lower blood sugar levels. One hundred fifty participants are randomly assigned to take the new drug, and 150 participants are randomly assigned to take a placebo. After 6 months of treatment, blood sugar levels are measured and compared to the starting levels. For those who took the new drug, the blood sugar levels had a mean reduction of 25 points with a standard deviation of 3.1, while for those who took the placebo, the blood sugar levels showed a mean reduction of 18 points with a standard deviation of 2.8. Assuming the standard deviations are true for the entire population, calculate 90% confidence intervals and evaluate whether there is evidence the new drug is working.
The interval for the new drug is from 24.584 to 25.416 points.

The interval for the placebo is from 17.624 to 18.376 points. Since the interval for the new drug lies above the interval for the placebo, there is evidence that the drug is working.


The interval for the new drug is from 24.504 to 25.496 points. The interval for the placebo is from 17.552 to 18.448 points.

Since the interval for the new drug lies above the interval for the placebo, there is evidence that the drug is working. The interval for the new drug is from 24.584 to 25.416 points. The interval for the placebo is from 17.624 to 18.376 points. Since the interval for the new drug lies above the interval for the placebo, there is evidence that the drug is not working.

The interval for the new drug is from 24.504 to 25.496 points. The interval for the placebo is from 17.552 to 18.448 points. Since the interval for the new drug lies above the interval for the placebo, there is evidence that the drug is not working.

Answers

Okay, here are the steps:

1) For the new drug group, the mean reduction is 25 points and standard deviation is 3.1.

To get the 90% CI, we calculate:

Mean ± (1.645 * SD)

= 25 ± (1.645 * 3.1)

= 24.584 to 25.416

2) For the placebo group, the mean reduction is 18 points and standard deviation is 2.8.

To get the 90% CI, we calculate:

Mean ± (1.645 * SD)

= 18 ± (1.645 * 2.8)

= 17.624 to 18.376

3) Since the CI for the new drug (24.584 to 25.416) lies above the CI for the placebo (17.624 to 18.376), there is evidence that the drug is working.

The other options are incorrect. The CI for the new drug does not lie below the placebo CI, so there is evidence the drug is working, not not working.

Thekey is to compare the CI ranges for the two groups. If the CI range for the new drug group lies above the CI range for the placebo group, that indicates the new drug is likely more effective in reducing blood sugar levels, providing evidence that the drug is working.

Does this help explain the steps? Let me know if you have any other questions!

Tyler struggled with his math class early in the year, but he has been working to improve his scores. There is one test left, and he is hoping that his final average test score will be 75. What score will Taylor need to get on Test 6 to finish the year with an average score of 75?

Answers

Tyler will need to score an 85 on Test 6 to finish the year with an average score of 75.

To calculate the score that Tyler needs to get on Test 6 to achieve an average score of 75, we need to use the following formula

(average score) = (total points earned / total number of tests)

Let's assume that Tyler has taken five tests so far, and his total points earned are X. Also, let's assume that Test 6 is worth Y points.

Therefore, the equation becomes:

75 = (X + Y) / 6

Multiplying both sides by 6, we get:

X + Y = 450

Now, let's say Tyler's scores on his first five tests are as follows

Test 1: 65, Test 2: 72, Test 3: 70, Test 4: 78 and Test 5: 80

To find out how many points Tyler has earned so far (X), we simply add up his scores on the first five tests

X = 65 + 72 + 70 + 78 + 80

X = 365

Substituting this value of X in the equation we derived earlier, we get

365 + Y = 450

Solving for Y, we get:

Y = 85

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. Which jar of pasta has the greatest unit price?

Answers

Answer:

Jar 2 has the greatest unit price. B is correct.

Step-by-step explanation:

Jar 1: $1.60/16 oz = 10¢/ounce

Jar 2: $2.40/20 oz = 12¢/ounce

Jar 3: $2.64/24 oz = 11¢/ounce

Jar 4: $2.88/32 oz = 9¢/ounce

Jar 2 has the greatest unit price, so the correct answer is B.

The diameter of a child's bicycle wheel is 18 inches. Approximately how many revolutions of the wheel will it take to travel 1,700 meters? Use 3.14 for π and round to the nearest whole number. (1 meter ≈ 39.3701 inches) 3,925 revolutions 2,368 revolutions 1,184 revolutions 94 revolutions

Answers

The wheel does 1,184 revolutions in the 1700 meters.

How to find the number of revolutions?

To find the number of revolutions we need to take the quotient between the distance and the circumference of the wheel.

The circumference of a circle of diameter D is:

C = 3.14*D

So here we have:

C = 3.14*18in = 56.52 in

And we know that:

1 meter ≈ 39.3701 inches

Then the circumference in meters is:

C = 56.52/39.3701 m = 1.435m

The number of revolutions is:

1700m/1.435m = 1,184

That is the correct answer.

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Answer:

Step-by-step explanation:

First find the circumference:

π × 18 = 3.14 × 18 = 56.52"

56.52÷ 39.3701 inches in one meter = 1.4356 meters for the circumference.

Divide 1700 meters by 39.3701 = 1184.173

round to 1184 revolutions

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Question
Lori's Purse Melissa's Purse








Lori's and Melissa's purses are shown above. What is the difference between these two masses, in ounces?

Answers

Answer:

We can calculate the difference between Lori's and Melissa's purse masses by subtracting Melissa's purse mass from Lori's purse mass:

Lori's purse mass = 16 ounces

Melissa's purse mass = 11 ounces

Difference = Lori's purse mass - Melissa's purse mass

Difference = 16 ounces - 11 ounces

Difference = 5 ounces

Therefore, the difference between Lori's and Melissa's purse masses is 5 ounces.

which method uses an arithmetic mean to forecast the next period? group of answer choices naive. exponential smoothing. none of the above moving averages. adaptive filtering.

Answers

The method that uses an arithmetic mean to forecast the next period is "moving averages".

Which method is suitable for arithmetic mean?

The method that uses an arithmetic mean to forecast the next period is the "moving averages" method.

In this method, the average of the past observations is calculated, and this average is used as the forecast for the next period.

The number of past observations used in the calculation of the moving average depends on the specific variant of the method being used.

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the inequality 4/5-1/2p>9/5 is givin. solve the inequality for p

Answers

Answer:

p < -2

Step-by-step explanation:

Answer:

The answer is -2

Step-by-step explanation:

4/5-1/2p>9/5

C.L.T

-1/2p>9/5-4/5

-1/2p>5/5

-1/2p=1

-p/2>1

-p=2

p= -2

If a stock has a beta measure of 2.5, discuss what this means(be specific).

Answers

The means of a stock that has a beta measure of 2.5 is 2.5%.

A beta measure of 2.5 indicates that the stock is 2.5 times as volatile as the market.

This means that if the market goes up by 1%, the stock is expected to go up by 2.5%.

The beta measure is a measure of the volatility of a stock relative to the market.

If the market goes down by 1%, the stock is expected to go down by 2.5%.

Therefore,

The stock is considered to be more risky than the average stock in the market.

A beta measure of 2.5 indicates that the stock is 2.5 times as volatile as the market.

This means that if the market goes up by 1%, the stock is expected to go up by 2.5%.

Conversely, if the market goes down by 1%, the stock is expected to go down by 2.5%.

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use the 60 mutual funds in the table above to conduct the hypothesis test. what is the p value? p value is (to 4 decimals)

Answers

Welch's two-sample t-test indicates that the average of Load Return's population is significantly greater than the average of No Load Return's population, with a large effect size.

The null hypothesis (H0) that the two population means are equal is rejected as the p-value (0.005) is less than the chosen significance level (α=0.05). This indicates that the chance of a Type 1 error is small, and the alternative hypothesis (H1) that the average of Load Return's population is greater than the average of No Load Return's population is supported.

The test statistic (T=-2.646) falls outside the 95% critical value accepted range, which further supports the rejection of H0. The effect size (0.68) is considered large, indicating that the difference between the two population means is substantial.

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Complete Question:

use the 60 mutual funds in the table below to conduct the hypothesis test. what is the p value? p value is (to 4 decimals)

Martin deposits $7,000 in an account at Victory Bank. Find the amount of interest
earned and the total value of his account after 36 months

Answers

Answer:

$682.50

Step-by-step explanation:

Simple interest only builds on the initial deposit.

Interest Formula

Unlike compound interest, the change per time period is constant for simple interest. This means that simple interest can be calculated through the formula:

I = Prt

In this formula, I represents the amount of interest earned. P is the principle, which is the initial deposit. r is the rate of interest expressed as a decimal. t is the time in years.

Solving For Interest

Now, we can use the information we were given to solve for the amount of interest earned. The question states that the principle is $7,000. From the table, we can tell that the rate is 0.0325. Finally, t is 3 years because 36 months = 3 years. Then, plug these values into the formula.

I = 7000 * 0.0325 * 3I = 682.5

This means that the account at Victory Bank would earn $682.50 over the course of 3 years.

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