An assumption of the independent samples t test is that the populations from which the samples are drawn have equal variability. This assumption is known as:

a) The probability that a person waits fewer than 12.5 minutes is 0.8333 or 83.33%.

b) On average, a person must wait 7.5 minutes, with a standard deviation of approximately 4.3301 minutes.

c) Ninety percent of the time, the minutes a person must wait falls below 13.5 minutes.

To find the probability that a person waits fewer than 12.5 minutes, you can use the formula for a uniform distribution:

P(X < x) = (x - a) / (b - a)

Where X is the random variable (waiting time), a is the minimum waiting time (0 minutes), b is the maximum waiting time (15 minutes), and x is the given time (12.5 minutes).

P(X < 12.5) = (12.5 - 0) / (15 - 0)

= 12.5 / 15

= 5/6 ≈ 0.833

So, the probability that a person waits fewer than 12.5 minutes is approximately 0.833 or 83.3%.

For a uniform distribution, the mean (average waiting time) can be calculated using the formula μ = (a + b) / 2, and the standard deviation using the formula σ = [tex]\sqrt{\frac{{(b - a)^2}}{{12}}}[/tex].

Mean (μ) = (0 + 15) / 2 = 7.5 minutes

Standard deviation (σ) = [tex]\sqrt{\left(\frac{{15 - 0}}{2}\right)^2}[/tex]

Standard deviation (σ) = [tex]\sqrt{\frac{{15^2}}{{12}}}[/tex] ≈ 4.33 minutes

On average, a person must wait 7.5 minutes for a bus, with a standard deviation of approximately 4.33 minutes.

To find the value below which 90% of the time falls, we multiply the desired percentile (90%) by the total range of possible values (15 - 0 = 15) and add it to the lower bound, giving us:

= 0.9 x 15 + 0

= 13.5 minutes

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Answer: This question is asking for your answer, so it is asking for a possibility of what the person responds with.

Step-by-step explanation:

Here is an example:

The school takes a survey on what snacks they should add

Sample:

I think that they should add healthier snacks like carrots.

The polynomial will be given as -0.02x⁴ - 0.3x³ + 4.4x² - 14.2x + 20

N(x) = -0.1x³ + x² - 3x + 4 (number of items sold in millions)

P(x) = 0.2x + 5 (average price of 0ne item in dollars)

R(x) = N(x) * P(x)

R(x) = (-0.1x³ + x² - 3x + 4) * (0.2x + 5)

Multiply the value of Rx above

mulytiply the terms  

(-0.1x³ + x² - 3x + 4) * (0.2x) and

(-0.1x³ + x² - 3x + 4) * 5

R(x) = [-0.1x³ x (0.2x + 5)] + [x² * (0.2x + 5) - 3x] * [(0.2x + 5) + 4 * (0.2x + 5)]

R(x) = (-0.02x⁴ - 0.5x³) + (0.2x³ + 5x²) - (0.6x² + 15x) + (0.8x + 20)

When we simplify the multiplication that he have here we would have -0.02x⁴ - 0.3x³ + 4.4x² - 14.2x + 20

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100,000 people watched the show the first time it aired

From the question, we have the following parameters that can be used in our computation:

p = 100,000 • (1.1)^w

Where w is the number of weeks since the show first aired.

Set w to 0 to calculate the number of required people

So, we have

p = 100,000 • (1.1)^0

Evaluate

p = 100,000

Hence, the number of poeple is 100,000

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The volume of the soup pot is approximately 429.6 cubic inches.

The volume of a cylinder (like the soup pot) can be calculated using the formula:

V = πr²h

where:

V = volume

π = 3.14159 (approximate value of pi)

r = radius

h = height

Substituting the given values, we get:

V = π*(4²)*(8.5)

V = 3.14159*(16)*(8.5)

V = 429.58124

Rounding to the nearest tenth, the volume of the soup pot is approximately 429.6 cubic inches.

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If a cylinder is sliced in a direction perpendicular to the base, the resulting cross section would be a rectangle.

A cylinder has a circular base, and a perpendicular slice would cut through the circular base and create a flat rectangular shape.

To visualize this, imagine a cylinder as a can of soup. If you were to cut the can of soup straight down the middle, perpendicular to the base, you would create a cross section that is a rectangle. This rectangular cross section would have a width and a length, which would be equal to the diameter of the circular base of the cylinder.

In geometry, a rectangle is defined as a quadrilateral with four right angles, and opposite sides that are equal in length. Therefore, a rectangular cross section of a cylinder would also have these properties.

In summary, if a cylinder is sliced in a direction perpendicular to the base, the resulting cross section would be a rectangle with equal width and length, and four right angles.

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The mean is calculated by adding up all the numbers in the data set and dividing by the total number of values. In this case, the sum of the numbers is 105 and there are 16 values, so the mean is 6.56 cups of coffee per week on average.

To find the median, we need to arrange the numbers in order from smallest to largest. The ordered list is: 1, 1, 2, 2, 3, 4, 5, 5, 6, 6, 7, 8, 8, 9, 9, 36. The median is the middle value, which is 6.

In this case, the median is a better measure of central tendency because the data set includes an outlier value of 36 cups per week. This single value skews the mean and makes it less representative of the majority of employees' coffee consumption. The median, on the other hand, is not affected by outliers and represents the middle value in the data set, which is more reflective of the typical coffee consumption for this office.

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Each row and column combination in a contingency table is called a cell.

A contingency table is a table that displays the frequency distribution of two or more categorical variables. The table is used to determine whether there is a relationship between the two variables being studied.

The contingency table displays the number of occurrences of each possible combination of categories for the two variables. The table is organized such that the categories for one variable are listed in rows, and the categories for the other variable are listed in columns.

Each cell in the table displays the number of times a particular combination of categories occurs. For example, if one variable is gender (male/female) and the other variable is employment status (employed/unemployed), one cell in the contingency table might display the number of females who are employed.

By examining the frequencies in the contingency table, it is possible to identify any patterns or relationships between the two variables being studied. For example, it may be observed that more females than males are unemployed. This information can be used to make decisions and predictions in a variety of fields, including marketing, social science, and medicine.

In conclusion, a contingency table is a useful tool for analyzing the relationship between two categorical variables, and each row and column combination in the table is referred to as a cell.

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Answer:

(2x-3) and (x-5)

Step-by-step explanation:

To factor the expression (2x-3)(x-5), we can use the distributive property of multiplication over addition or subtraction:

(2x-3)(x-5) = 2x(x-5) - 3(x-5)

Now we can use the distributive property again to factor out the common factor of (x-5):

2x(x-5) - 3(x-5) = (2x - 3)(x - 5)

So the factors of (2x-3)(x-5) are (2x-3) and (x-5).

The equation which can be used to find the value of "x" is "3x = 2x-3", and the value of "x" is x= -3.

In geometry, a "Tangent" to a circle is a straight line that intersects the circle at exactly one point, known as the point of tangency. The tangent line is always perpendicular to the radius of the circle at the point of tangency.

We know that, the two tangent drawn from an "external-point" to the two pints touching the circle are equal.

So, we can write, CH = BH and FH = GH;

Substituting the values of CH, BH and FH , GH;

We get,

⇒ 3x = 2x - 3      and      3y + 2 = 5y

⇒ x = -3               and     y = 1;

Therefore, the value of "x" is -3 and value of "y" is 1.

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Step-by-step explanation:

6x^2 - 14x >= -4

6x^2 - 14x +4  >= 0

Use Quadratic Formula to find

(x-2)(x-1/3) >= 0       If both +   this is true

                                If both neg this is true

(- inf , 1/3]    U    [2 , + inf )      is x

The moles of AgCN formed is also 0.1534 mol. Since 1 mole of AgCN produces 1 mole of Ag+ ions, the silver ion concentration is also 0.1534 M.
Therefore, [Ag+][Ag+] = 0.1534 M.

To calculate the silver ion concentration, we first need to determine the moles of silver nitrate and potassium cyanide in the solution.
Moles of AgNO3 = 1.00 g / 169.87 g/mol = 0.00589 mol
Moles of KCN = 10.0 g / 65.12 g/mol = 0.1534 mol
Next, we need to determine which reactant is limiting. To do this, we can use the stoichiometry of the balanced chemical equation:
AgNO3 + KCN → AgCN + KNO3
From the equation, we can see that 1 mole of AgNO3 reacts with 1 mole of KCN to produce 1 mole of AgCN.
The moles of AgNO3 and KCN are in a 1:1 ratio, so KCN is the limiting reactant since it has the higher number of moles.

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The silver ion concentration, [Ag+], in the solution prepared by dissolving 1.00 g of AgNO3 in water to make 1.00 L of solution is 0.0059 M.

To calculate the silver ion concentration of a solution, we need to calculate the molarity which is the number of moles of solute (in this case, AgNO3) per liter of solution.

First off, the molar mass of AgNO3 is approx. 170 g/mole. Therefore, the number of moles in 1.00 g of AgNO3 is 1.00 g / 170 g/mole = 0.0059 moles. Since the solution is 1.00 L, therefore, the molarity ([Ag+]) is 0.0059 moles/1.00 L = 0.0059 M.

It's worth noting that we can ignore the presence of KCN in this calculation because it doesn't alter the concentration of Ag+ ions in the solution.

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Answer:

The girl read 1,159 - 72 = 1,087 pages after the first day.

Let d be the number of days after the first day that she took to finish the book.

The total number of pages she read on these d days is 40d.

The equation that can be used to find how many more days it took her to read the book after the first day is:

40d = 1,087

Solving for d:

d = 1,087/40

d ≈ 27.175

Therefore, it took her approximately 27 more days to finish reading the book after the first day.

To compute the four-week and five-week moving averages for a time series, you would first add up the values for each consecutive four or five weeks, depending on which moving average you are calculating. Then, you would divide the total by four or five, respectively, to find the average for that time period. You would then repeat this process for each subsequent set of four or five weeks, depending on which moving average you are calculating.

For example, to calculate the four-week moving average for a time series with values of 10, 12, 14, 16, 18, 20, 22, and 24, you would add up the values for each consecutive set of four weeks:

Weeks 1-4: 10 + 12 + 14 + 16 = 52
Weeks 2-5: 12 + 14 + 16 + 18 = 60
Weeks 3-6: 14 + 16 + 18 + 20 = 68
Weeks 4-7: 16 + 18 + 20 + 22 = 76
Weeks 5-8: 18 + 20 + 22 + 24 = 84

Then, you would divide each total by four to find the four-week moving average for that time period:

Weeks 1-4: 52 / 4 = 13
Weeks 2-5: 60 / 4 = 15
Weeks 3-6: 68 / 4 = 17
Weeks 4-7: 76 / 4 = 19
Weeks 5-8: 84 / 4 = 21

To calculate the five-week moving average, you would follow the same process but with consecutive sets of five weeks instead of four.

Note that intermediate calculations should not be rounded, but the final answers should be rounded to two decimal places, as specified in the question.

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It will take 3.33 hours for the two trains to be 500 miles apart.

To solve this problem, we can use the formula distance = rate x time. Let's assume that the trains start out x miles apart from each other. As they travel in opposite directions, they will be moving away from each other at a combined rate of 65 + 85 = 150 miles per hour.

We want to find out how long it will take for the two trains to be y miles apart, so we can set up an equation:

y = 150t

where t is the time in hours.

To solve for t, we can divide both sides by 150:

t = y/150

So if we want to find out how long it will take for the two trains to be 500 miles apart, we can substitute y = 500:

t = 500/150 = 3.33 hours (rounded to two decimal places)

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When a right rectangular prism is sliced by a plane passing through five of the six faces of the prism, the resulting cross section is a pentagon.

A right rectangular prism has six rectangular faces, and when a plane passes through five of these faces, it cuts across them in a way that forms a pentagon. The shape of the resulting cross section will depend on the angle and orientation of the plane in relation to the prism, but it will always be a five-sided polygon.

It is important to note that the cross section resulting from the slicing of a right rectangular prism will have the same dimensions as the prism itself, with the exception of the depth, which will depend on the angle and orientation of the plane. This means that if the prism has dimensions of length, width, and height, the resulting cross section will have length and width equal to those of the prism, but a different depth.

Overall, the resulting cross section of a right rectangular prism that is sliced by a plane passing through five of its six faces will be a pentagon, with dimensions that are proportional to those of the original prism.

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We classify x as belonging to class 1, since it has the highest posterior probability.

To classify the point x = (0.5, 0.5], we need to calculate the posterior probabilities of each class and choose the class with the highest probability.
The posterior probability of class i given x is given by Bayes' theorem:
P(Y=i|X=x) = P(X=x|Y=i) * P(Y=i) / P(X=x)
where P(X=x|Y=i) is the class-conditional density of class i evaluated at x, P(Y=i) is the prior probability of class i, and P(X=x) is the marginal probability of x (which is the same for all classes in this case).
Using the multivariate normal density formula, we can calculate the class-conditional densities as follows:
f1(x) = (2π|Σ1|)-1/2 exp{-1/2(x-M1)'Σ1^-1(x-M1)} = (2π|Σ1|)-1/2 exp{-1/2(0.5^2+0.5^2)}
f2(x) = (2π|Σ2|)-1/2 exp{-1/2(x-M2)'Σ2^-1(x-M2)} = (2π|Σ2|)-1/2 exp{-1/2[(0.5-1)^2+(0.5-1)^2+2*0.2*(0.5-1)*(0.5-1)]}
f3(x) = (2π|Σ3|)-1/2 exp{-1/2(x-M3)'Σ3^-1(x-M3)} = (2π|Σ3|)-1/2 exp{-1/2[(0.5+1)^2+(0.5-1)^2+2*0.2*(0.5+1)*(0.5-1)]}
Using the given prior probabilities, we have P(Y=1) = P(Y=2) = P(Y=3) = 1/3.
To calculate the b P(X=x), we can use the total probability theorem:
P(X=x) = Σi P(X=x|Y=i) * P(Y=i) = f1(x)*1/3 + f2(x)*1/3 + f3(x)*1/3
Now we can calculate the posterior probabilities:
P(Y=1|X=x) = f1(x)*1/3 / P(X=x)
P(Y=2|X=x) = f2(x)*1/3 / P(X=x)
P(Y=3|X=x) = f3(x)*1/3 / P(X=x)
To classify x, we choose the class with the highest posterior probability:
argmaxi P(Y=i|X=x)
Calculating the posterior probabilities and choosing the maximum, we get:
P(Y=1|X=x) = 0.6356
P(Y=2|X=x) = 0.2113
P(Y=3|X=x) = 0.1531

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The polynomial 10b³ + 5b² + 4 has no common factor other than 1.

From the question, we have the following parameters that can be used in our computation:

10b³ + 5b² + 4

The terms of the above expressions are

10b³, 5b² and 4

The terms of the above polynomial have no common factor other than 1.

Hence, the polynomial cannot be factored

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1. H0: There is no difference between the rate of absenteeism between both colleges students.

2. t- test statistic should be calculated for this problem.

A t-test should be used to test this hypothesis since the population standard deviation is unknown. The test statistic that should be calculated for this problem is t, not Z. Therefore, the correct answer is d. None of the above for the test statistic.

Based on the given information, we are conducting a hypothesis test for a single sample mean, with the population standard deviation unknown. The null hypothesis and the test statistic.
The null hypothesis for this problem is that there is no difference between the rate of absenteeism between Notre Dame College students and Honors students. The population in this case refers to all Notre Dame College students; the sample is the group of 25 Honors students.

1. Null Hypothesis (H0): The null hypothesis states that there is no significant difference between the population means. In this case, the null hypothesis would be:
H0: There is no difference between the rate of absenteeism between Notre Dame College students and Honors students.

2. Test Statistic: Since the population standard deviation is unknown, we should use the t-test statistic. The t-test is appropriate when dealing with a single sample mean and an unknown population standard deviation.

So, the correct answers are:
- Null Hypothesis: There is no difference between the rate of absenteeism between Notre Dame College students and Honors students.
- Test Statistic: t-test.

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To answer this question, we need to use the concept of probability and the properties of a standardized test. We know that a standardized test is designed to have a mean score of 50 and a standard deviation of 4. This means that the majority of scores will fall within a range of four points above or below the mean.

To calculate the probability of a score being above 54, we need to find the z-score, which is a measure of how many standard deviations a particular score is away from the mean. To do this, we can use the formula:

z-score = (score - mean) / standard deviation

Plugging in the values we have:

z-score = (54 - 50) / 4 = 1

This tells us that a score of 54 is one standard deviation above the mean. We can then use a z-score table or a calculator to find the probability of a score being above this point. From a standard normal distribution table, we can find that the probability of a z-score being greater than 1 is approximately 0.1587. Therefore, the probability of a test score being above 54 is approximately 15.87%.

In summary, the probability of a test score being above 54 on a standardized test with a mean of 50 and a standard deviation of 4 is 15.87%.
A standardized test with a mean of 50 and a standard deviation of 4 implies that the majority of scores will be clustered around the average, with fewer scores as you move away from the mean. To determine the probability of a test score being above 54, we'll use the concept of standard deviations and the normal distribution.

First, we need to find how many standard deviations above the mean the score of 54 is. To do this, we use the formula: (score - mean) / standard deviation = (54 - 50) / 4 = 1. This means that a score of 54 is one standard deviation above the mean.

Next, we need to find the probability of a test score being more than one standard deviation above the mean. Using a standard normal distribution table or calculator, we can find that the probability of a score being within one standard deviation from the mean is approximately 68.27%. Therefore, the probability of a score being outside of one standard deviation from the mean is 100% - 68.27% = 31.73%.

Since the normal distribution is symmetrical, half of this 31.73% represents scores below one standard deviation from the mean, and the other half represents scores above. Therefore, the probability of a test score being above 54 (one standard deviation above the mean) is approximately 31.73% / 2 = 15.865%.

In summary, the probability that a test score is above 54 on a standardized test with a mean of 50 and a standard deviation of 4 is approximately 15.865%.

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The standard form of the line 4y = 5 - x is:

4y + x = 5

The standard form of a linear equation is:

ax + by = c

Where a, b, and c, are real numbers, and x and y are the variables.

Here we have the equation:

4y = 5 - x

To have the standard form, we only  need to have the two variables in the same side, then we can add x in both sides to get:

4y + x = 5 - x + x

4y + x = 5

That is the standard form.

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A function’s domain indicates each feasible input for which the function is valid, otherwise known as the independent variable.

The range of a function, on the other hand, represents all attainable output values, also referred to as the dependent variable, that the function can generate given its domain.

Simply put, the set of figures we obtain after inserting the field values into the function are considered the scope of such a function. Another mathematical concept relevant to functions is the horizontal asymptote—a continuous line that the function approaches as the autonomous input diverges positively or negatively towards infinity.

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The expression can be written as s = 12k.

Given that s varies directly with p,

Therefore,

s ∝ p

Let k be the proportionality constant,

s = kp

Now,

When, s = 36, p = 3

So,

36 = 3k

k = 12

therefore,

s = 12k

Hence, the expression can be written as s = 12k.

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The equivalent value of the exponential equation is A = -5m⁻³n²p⁻²

Given data ,

Let the exponential equation be represented as A

Now , let the first expression be p = 25m³n⁵p

Let the second expression be q = -5m⁶n²p³

Now , A = p / q

On simplifying , we get

From the laws of exponents , we get

mᵃ / mᵇ = mᵃ⁻ᵇ

A = ( -25/5 ) m³⁻⁶n⁵⁻²p¹⁻³

A = -5m⁻³n²p⁻²

Hence , the equation is A = -5m⁻³n²p⁻²

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The complete question is attached below :

Simplify 25m³n⁵p over -5m⁶n²p³ equals?

The list can be shuffled as follows:

Two-dimensional (2D) shapes are shapes that have only the dimensions of width and length but lack depth or height.

Some examples of two-dimensional (2D) shapes are given below:

Due to their lack of depth, 2D shapes are flat and cannot be held in the hand.

Three-dimensional (3D) shapes are shapes that have the dimensions of width, length, and depth or height.

Some examples of three-dimensional (3D) shapes are given below:

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On Sunday mornings, Jason enjoys reading the sports. The structure is supported by a pillar at each corner.

The sentence depicts a building that is supported at each corner by something. The word for such a supporting structure is "pillar," which refers to a vertical, upright support that is frequently employed to hold up a building or other structure.

The other possibilities do not fit the sentence's context as well. "Column" is a word that sounds similar to "pillar" and may work, but it is normally used to indicate a vertical support that is more slender and decorative than a pillar.

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As per the given values, the volume of the prism is 1235/12 cubic centimetres

Length of the prism = 3.1/4 cm

Width of the prism = 5 cm

Height of the prism = 6.1/3 cm

Converting the given values to proper fractions -

Length of prism = 3.1/4

= (3 × 4 + 1)/4

= 13/4

Height of prism = 6.1/3

= (6 × 3 + 1)/3

= 19/3

Calculating the volume of a prism, by using the formula -

Volume = Length × Width × Height.

Substituting the values -

= 13/4 × 5 × 19/3

= 13 × 5 × 19/4 × 3

= 1235/12

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Answer:

Step-by-step explanation:

30.48 cm in one foot 30.48 divided by your hand which is 6.5 cm=4.6 so you need 5 palm widths.