The assumptions include:
1. The observations are normally distributed.
2 The observertions are independent.
What are the test hypothesis?Test hypotheses include the null hypothesis that the anxiety level is same before after the course and the alternative hypothesis that the anxiety level derveases after taking the course.
The standard deviation is 1.1475. The value of to will be:
= -1.125 / (1.1475 / √16)
= 3.9212
Based on the p value, it should be noted that the null hypothesis is rejected.
In conclusion, the anxiety level decrease after the students take the course.
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Before you took this course, you probably heard many stories about Statistics courses. Oftentimes parents of students have had bad experiences with Statistics courses and pass on their anxieties to their children. To test whether actually taking AP Statistics decreases students' anxieties about Statistics, an AP Statistics instructor gave a test to rate student anxiety at the beginning and end of his course.
Anxiety levels were measured on a scale of 0-10. Here are the data for 16 randomly chosen students from a class of 180 students:
Do the data indicate that anxiety levels about Statistics decreases after students take AP Statistics? Test an appropriate hypothesis and state your conclusion.
Line A has equation y = -4x + 1 and line B contains the points (-2,1) and (1,-11). Select any statement(s) below that are true.
Line B has a slope of -5.
Line A has a slope of -4.
Line A and line B have the same slope.
Line B has a flatter slope than line A.
Line A has a flatter slope than line B.
Answer:
Line A has a slope of -4
Line A and line B have the same slope
Step-by-step explanation:
Line A is in the slope-intercept form (y = mx + b), where m is the slope and b is the y-intercept. As we can see, -4 is m in line A so -4 is the slope of line A.
If we have two points on a line, we can find the slope using the slope formula
[tex]m = \frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex], where x1 and y1 are one of the points and x2 and y2 come from the other point.
Thus, if we allow (-2, 1) to be x1 and y1 and (1, -11) to be x2 and y2,
[tex]m=\frac{-11-1}{1-(-2)}\\ m=-4[/tex]
Since the slope of Line B is -4, it has the same slope as line A
What is the term to term rule in the sequence 1,2,4,7,11
The term to term rule in the sequence is specific formula which describes the each term of sequence. So, term by term formula for sequence 1,2,4,7,11.. is equals to the [tex] x_n = \frac{n(n-1)}{2} + 1[/tex].
A sequence, or a series, is a chain of numbers obtained by following a particular common factor. To complete a series or sequence, we need to determine the common factor that guides the series . We have a sequence of number defined as 1, 2,4,7, 11, ... We have to determine term rule for this sequence. Each number in the sequence is called a term. Now, check the known terms of sequence, first term = 1.
Difference between first two terms =1
difference between second and third=2
difference between third and fourth terms = 3
difference between fourth and fifth terms = 4
So, the difference between two successive terms increases by 1. Thus the term by term rule is written as [tex] x_n = \frac{ n(n-1)}{2} + 1[/tex], where n is nᵗʰ term.
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PLEASE HELP I NEED HELP ASAP
Answer:
Sin= 35/37
cos= 13/37
tan= 35/13
Step-by-step explanation:
ABCD is a rhombus.
BCE is an isosceles triangle.
ABE is a straight line.
Work out the size of angle DCA.
Joey has 10 coins one of his coins is a 50 cent piece. If he has a total of $.85 what are the other coins
Answer:
Step-by-step explanation:
First, take 1 coin away and subtract .5 from the total of 85 cents to get 9 coins for 35 cents. Then, you must figure out any amount of coins that will fit that value for 9 coins; A penny = 1 cent, nickel = 5 cents and dime = 10 cents
You can do 2 nickels 2 dimes and 5 pennies for 9 coins total.
You can also do an equation for more intricate problems:
.10x + .05y + .01z = .35
where you would solve for a variable and input the new equation in that variable to solve for your variables. I hope this helps :)
The 20% on a $8 sandwhich?
Answer: 1.60
Step-by-step explanation:
ask siri
Answer:
1.6$Step-by-step explanation:
Greetings!!
[tex]step1[/tex]
20%=100%/5
[tex]step2[/tex]
8/5=1.6
[tex]step3[/tex]
5= 10/2
[tex]step4[/tex]
Divide the numbers by 10:
8/10=0.8
[tex]step5[/tex]
Multiply the numbers from step4 by 2.
0.8×2= 1.6
If you have any questions tag it on comments
Hope it helps!!!
I need help on this asap!
If Mr Corazon produces the model that would give the most profit only, this idea would be incorrect. The reason is that that poor people would not be able to buy the product.
What is profit maximization?
Profit maximization is the process by which a business or a firm determines the optimal level of output or production that leads to the highest possible profit. It is an important goal for most firms, as it helps to ensure their long-term sustainability and competitiveness in the market.
Based on the question, at the profit of $375 a piece, it would mean that the price has become too high. Less people would but the product. This makes his idea a bad one.
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The reading on the thermometer is -10 degrees celsius and the temperature drops with 10 degrees celsius what will the new reading be
The thermometer reads -10 degrees Celsius, and the temperature drops by 10 degrees Celsius. As a result, the new thermometer reading will be -20 degrees Celsius.
If the temperature drops by 10 degrees Celsius and the initial reading on the thermometer is -10 degrees Celsius, we can calculate the new reading as follows:
New reading = Initial reading - Temperature drop
New reading = (-10) - 10
New reading = -20
Therefore, the new reading on the thermometer will be -20 degrees Celsius.
When we say the temperature drops by 10 degrees Celsius, we mean that the temperature decreases by 10 degrees Celsius from its initial value. In this case, the initial value is -10 degrees Celsius.
So, if the temperature drops by 10 degrees Celsius, we need to subtract 10 from the initial value to get the new temperature reading. This is because a decrease in temperature means the temperature value becomes lower.
The resulting new reading of -20 degrees Celsius is 10 degrees Celsius lower than the initial reading of -10 degrees Celsius. It indicates that the temperature has decreased further, and it is now even colder than before.
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A certain baseball pitcher gives up a base hit (on average) once every 15 pitches. in a particular game he threw 120 pitches. find the probability he gave up at MOST 2 base hits.
The probability that the pitcher gave up at most 2 base hits in the game is approximately 0.53.
What is probability?
Probability is a branch of mathematics in which the chances of experiments occurring are calculated.
Let X be the number of base hits given up in 120 pitches. Then X follows a binomial distribution with parameters n = 120 (number of trials) and p = 1/15 (probability of success in each trial).
The probability of giving up at most 2 base hits can be calculated as follows:
P(X ≤ 2) = P(X = 0) + P(X = 1) + P(X = 2)
Using the binomial probability formula, we have:
P(X = k) = (n choose k) * p^k * (1 - p)^(n - k)
where (n choose k) is the binomial coefficient, which gives the number of ways to choose k successes from n trials.
Plugging in the values, we get:
P(X = 0) = (120 choose 0) * (1/15)^0 * (14/15)^120 ≈ 0.028
P(X = 1) = (120 choose 1) * (1/15)^1 * (14/15)^119 ≈ 0.17
P(X = 2) = (120 choose 2) * (1/15)^2 * (14/15)^118 ≈ 0.33
Therefore,
P(X ≤ 2) = 0.028 + 0.17 + 0.33 ≈ 0.53
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help please i don’t get it
[tex]\stackrel{ \textit{multiplying the 1st equation by 9} }{\begin{array}{lllllll} 9(~x&+y&=& ~~ 0)\\\\ -9x&-5y&=&-24 \end{array}}\hspace{5em} \begin{array}{llll} ~~ 9x&+9y&=&0\\\\ -9x&-5y&=&-24\\\cline{1-4} ~~0&-4y&=&-24 \end{array} \\\\[-0.35em] ~\dotfill\\\\ -4y=-24\implies y=\cfrac{-24}{-4}\implies \boxed{y=6} \\\\\\ \stackrel{\textit{substituting on the 1st equation}}{x+(6)=0\implies \boxed{x=-6}} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill (-6~~,~~6)~\hfill[/tex]
______are set of repeated activitieswhich have well defined results
Answer:
statistical experiments performed on a well defined sample space
Step-by-step explanation:
experiments can be performed either by probability, or other repetitive actions on sample space for possible outcomes.
the radius of a sphere is increasing at a rate of 4 mm/s. how fast is the volume increasing (in mm3/s) when the diameter is 100 mm? (round your answer to two decimal places.)
The volume is increasing at a rate of 16755.21 mm³/s when the diameter is 100 mm.
We are given that the radius of a sphere is increasing at a rate of 4 mm/s.
Let's first write the formula of the volume of a sphere;
[tex]V=43πr3V =\frac{4}{3}\pi r^3V =34πr3[/tex]
Now we can differentiate it by using the chain rule;
[tex]V'=43π3r2drdt+4πr3(4)orV' =4πr2drdt[/tex]
The problem asks for how fast the volume is increasing, so we need to find V' when the diameter is 100 mm, or r=50 mm.
Thus;
[tex]V'=4π(50²)(4) =40,000πV' =125663.71 mm³/s[/tex]
Therefore, the volume is increasing at a rate of 125663.71 mm³/s when the diameter is 100 mm. Now we round to two decimal places to get;V'=16755.21 mm³/s.
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Write an explicit formula for the sequence.
a^n+1=an+7, a^1=−22
A. a^n=7−22n
B. a^n=−22+7(n−1)
C. a^n=7−22(n−1)
D. a^n=−22+7n
Answer:
[tex]\textsf{B)} \quad a_n=-22+7(n-1)[/tex]
Step-by-step explanation:
An explicit formula for a sequence allows you to find the nth term of the sequence.
A recursive formula for a sequence allows you to find the nth term of the sequence provided you know the value of the previous term in the sequence.
Given recursive rule:
[tex]\begin{cases}a_{n+1}=a_n+7\\a_1=-22\end{cases}[/tex]
From the given recursive rule, we can see that each term is 7 more than the previous term. Therefore, the common difference between terms is d = 7.
Explicit formula[tex]a_n = a_1 + (n - 1)d[/tex]
Input the values of a₁ and d into the explicit formula:
[tex]\implies a_n=-22+(n-1) \cdot 7[/tex]
[tex]\implies a_n=-22+7(n-1)[/tex]
Therefore, the explicit formula for the given sequence is:
[tex]\boxed{a_n=-22+7(n-1)}[/tex]
the ratio of the sides of a triangle is 3:10:7. What is the length of the shorest side?
Answer:
The length of the shortest side is 3 units.
Step-by-step explanation:
Let's assume that the shortest side has a length of 3x, where x is a constant.
Then, the other sides would have lengths of 10x and 7x, respectively.
To check if this is a valid triangle, we need to make sure that the sum of the lengths of any two sides is greater than the length of the third side:
3x + 10x > 7x (sum of shortest and middle side is greater than longest side)
3x + 7x > 10x (sum of shortest and longest side is greater than middle side)
10x + 7x > 3x (sum of middle and longest side is greater than shortest side)
Simplifying these inequalities, we get:
13x > 7x
10x > 3x
17x > 0
All of these inequalities are true if x > 0, so our assumption is valid.
Therefore, the length of the shortest side is 3x. To find the value of x, we can set up the following equation based on the given ratio:
3x : 10x : 7x = 3 : 10 : 7
Simplifying this equation by dividing all sides by x, we get:
3 : 10 : 7 = 3 : 10 : 7
This is true, so any value of x will satisfy the given ratio.
However, to find the length of the shortest side, we can simply substitute x = 1 into our assumption:
Shortest side = 3x = 3(1) = 3
Therefore, the length of the shortest side is 3 units.
Hope this helps! Sorry if this is wrong. :]
what rattional numbers are between -5.25 and -5.26
Answer:
-5.255
Step-by-step explanation:
Using trigonometry, work out the length y. Give your answer in centimetres to 1 d.p. y 6.1 cm 39° Not drawn accurately
The length of the opposite side (y) is equal to 3.2 centimeters.
How to calculate the length y?In order to determine the length of the opposite side (y), we would apply the sine trigonometry ratio because the given side lengths represent the opposite side and hypotenuse of a right-angled triangle.
cos(θ) = Adj/Hyp
Where:
Opp represent the opposite side of a right-angled triangle.Hyp represent the hypotenuse of a right-angled triangle.θ represent the angle.Based on the information provided in the image, we can logically deduce the following parameters:
Opp = y cm.Hyp = 6.1 cm.Angle, θ = 39°.By substituting the parameters into the sine trigonometry ratio formula, we have the following;
sin(θ) = Opp/Hyp
sin(39) = y/5
y = 5sin(39)
y = 3.2 centimeters.
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Missing information:
The question is incomplete and the complete question is shown in the attached picture.
SOMEONE HELP PLEASE I'LL GIVE BRAINLIEST IF BOTH OF THESE ARE CORRECT
Simplify.
a)√(30+10√5)
b) √(25+10√5+5)
help plss 1/3(3m+6)-2(2m+6)
Answer:
To simplify the expression, you can start by using the distributive property of multiplication over addition/subtraction and then combine like terms.
1/3(3m+6) - 2(2m+6)
= 1/33m + 1/36 - 22m - 26 (distribute the multiplication)
= m + 2 - 4m - 12 (simplify by multiplying and adding the terms)
= -3m - 10 (combine like terms)
Therefore, 1/3(3m+6)-2(2m+6) simplifies to -3m - 10.
A and B are events. Suppose P(A) = 0.3 and P(B│A) = 0.4. What is
the joint probability of A and B occurring
The jοint prοbability οf A and B οccurring is 0.12.
What is prοbability?Prοbability is a way οf calculating hοw likely sοmething is tο happen. It is difficult tο prοvide a cοmplete predictiοn fοr many events. Using it, we can οnly fοrecast the prοbability, οr likelihοοd, οf an event οccurring. The prοbability might be between 0 and 1, where 0 denοtes an impοssibility and 1 denοtes a certainty.
Here the given P(A)=0.3 and P(B│A) = 0.4
The οbjective is tο find the jοint prοbability οf A and B οccurring.
A and B are twο events.
The cοnditiοnal prοbability fοrmula is given by,
P(B│A) =[tex]\frac{P(A\cap B)}{P(A)}[/tex]
=> 0.4 = [tex]\frac{P(A\cap B)}{0.3}[/tex]
=> P(A∩B) = 0.12.
Hence the joint probability of A and B occurring is 0.12.
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Utilizando 4 veces el numero 4 y las operaciones que conoce, hallar los numeros desde 0 a 10
The process of counting from 0 to 10 using 4 fours and the four basic operations can be explained mathematically by the following equation: 4 + 4 - 4 x 4 / 4 + 4 + 4 - 4 = 12
The result when using 4 fours and the four basic operations (addition, subtraction, multiplication, division) to count from 0 to 10 is as follows:
0 = 4 ,1 = 4 + 4 = 8 ,2 = 8 - 4 = 4 ,3 = 4 x 4 = 16 ,4 = 16 / 4 = 4 ,5 = 4 + 4 + 4 = 12 ,6 = 12 - 4 = 8 ,7 = 8 x 4 = 32, 8 = 32 / 4 = 8 ,9 = 8 + 4 + 4 = 16 ,10 = 16 - 4 = 12 .The process of counting from 0 to 10 using 4 fours and the four basic operations can be explained mathematically by the following equation: 4 + 4 - 4 x 4 / 4 + 4 + 4 - 4 = 12. This equation is made up of four parts, each representing an operation in the correct order. The first part of the equation is 4 + 4 = 8, which adds the two fours together to get 8. The second part of the equation is 8 - 4 = 4, which subtracts the four from the 8 to get 4. The third part of the equation is 4 x 4 = 16, which multiplies the two fours together to get 16. The fourth part of the equation is 16 / 4 = 4, which divides the 16 by 4 to get 4. The fifth part of the equation is 4 + 4 + 4 = 12, which adds the three fours together to get 12. The sixth part of the equation is 12 - 4 = 8, which subtracts the four from the 12 to get 8. Finally, the last part of the equation is 8 + 4 + 4 = 16, which adds the three fours together to get 16.
By combining these six operations together, we can count from 0 to 10 using 4 fours and the four basic operations.
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What is the result when using 4 fours and the four basic operations (addition, subtraction, multiplication, division) to count from 0 to 10?
Show your work for every single one plssssss
The values would be
[tex]15. = \frac{1}{1000y^3}\\\\16. =-\dfrac{1024}{n^5}\\\\17. =\dfrac{1}{32k^{10}}\\\\18. =$\dfrac{49}{36c^2}$\\\\\\19. = $64^t$\\\\20. = $5 \cdot 5^t$\\\\21. = $81 \cdot 3^{4t}$\\\\22. = $\dfrac{2^{2t}}{2}$ or $2^{2t-1}$[/tex]
What is an expression?
In mathematics, an expression is a combination of symbols and/or numbers that represents a value or a relationship between values. Expressions can be as simple as a single number or variable, or they can be complex, involving multiple operations and functions. Expressions can be used to describe relationships between variables, to represent mathematical formulas or equations, and to perform calculations.
[tex]15. = \frac{1}{1000y^3}\\\\16. =-\dfrac{1024}{n^5}\\\\17. =\dfrac{1}{32k^{10}}\\\\18. =$\dfrac{49}{36c^2}$\\\\\\19. = $64^t$\\\\20. = $5 \cdot 5^t$\\\\21. = $81 \cdot 3^{4t}$\\\\22. = $\dfrac{2^{2t}}{2}$ or $2^{2t-1}$[/tex]
Hence, the values would be
[tex]15. = \frac{1}{1000y^3}\\\\16. =-\dfrac{1024}{n^5}\\\\17. =\dfrac{1}{32k^{10}}\\\\18. =$\dfrac{49}{36c^2}$\\\\\\19. = $64^t$\\\\20. = $5 \cdot 5^t$\\\\21. = $81 \cdot 3^{4t}$\\\\22. = $\dfrac{2^{2t}}{2}$ or $2^{2t-1}$[/tex]
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Christine swam 2 kilometers against the current in the same amount of time it took her to swim 8 kilometers with the current. The rate of the current was 3 kilometers per hour. How fast would Christine swim if there were no current?
If the rate of the current was 3 kilometers per hour, Christine's speed in still water is 5 kilometers per hour.
Let's start by assuming that Christine's speed in still water is x kilometers per hour. We know that the current is flowing at a rate of 3 kilometers per hour.
When Christine is swimming against the current, her effective speed is reduced by the speed of the current, so her speed is (x-3) kilometers per hour. If it takes her the same amount of time to swim 2 kilometers against the current as it does to swim 8 kilometers with the current, we can set up an equation:
time to swim 2 km against current = time to swim 8 km with current
We can use the formula distance = speed x time to express the distance that Christine covers in each scenario. The distance she covers against the current is 2 kilometers, and the distance she covers with the current is 8 kilometers. So our equation becomes:
2 / (x - 3) = 8 / (x + 3)
To solve for x, we can cross-multiply and simplify:
2(x + 3) = 8(x - 3)
2x + 6 = 8x - 24
6x = 30
x = 5
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Jefferson high school has an enrollment of 1,864 students and 564 graduate how much will still be in school
Answer:
1300
Step-by-step explanation:
1864-564= 1300 students
(total - no. graduated)
Hope this helps! :)
What is the equation of the line?
Answer:
Use the slope formula and slope-intercept form
y=mx+b to find the equation.
the steps and answers are in the photos
{I hope this helps you :)
I bought a new car to transport my kids and all their stuff. The value of the car y (in thousands of dollars) can be represented by the model y=41(0. 92)^t
, where t is the number of years since I purchased the car. Which value in the equation represents the decay factor?
The decay factor in the equation y=41(0.92)^t is the value of (0.92) raised to the power of t.
In this case, the base of the exponential function is 0.92, which is less than 1. This means that as t increases, the value of (0.92)^t decreases exponentially, leading to a decay in the value of y. The decay factor is the factor by which the value of y decreases each year.
In this case, the decay factor is 0.92, which means that the value of the car decreases by 8% each year. This is because (0.92) x 100% = 92%, so the value of the car decreases to 92% of its previous value each year.
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you are called to investigate a possible health concern in an office building that may be due to an environmental toxin. you arrange with a company that occupies two levels of the building to follow all 300 of their office employees. you intend to follow all employees for 30 days and every day, the employees report their health status. however, on day 10, 35 employees report respiratory distress. on day 20, 70 employees report respiratory distress. the remaining employees do not report any respiratory distress over the 30-day period.
The investigation of a possible health concern in an office building due to an environmental toxin involves following the health status of all employees for a period of time, identifying potential sources of toxins, and taking steps to remove the toxins and protect the health of the employees.
The possible health concern in an office building that may be due to an environmental toxin can be investigated by following all 300 of their office employees for 30 days and observing their health status. On day 10, 35 employees report respiratory distress and on day 20, 70 employees report respiratory distress.
The remaining employees do not report any respiratory distress over the 30-day period. This suggests that there may be an environmental toxin in the office building that is causing respiratory distress in the employees.
It is important to further investigate the source of the toxin and take steps to remove it in order to protect the health of the employees. This may include conducting air quality tests, examining the building for potential sources of toxins, and implementing measures to improve ventilation and air quality.
It is also important to continue monitoring the health of the employees and providing them with appropriate medical care if needed.
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The square ABCD is reflected over
the y-axis then translated five units
down and one unit to the left to
make the square A'B'C'D'.
Question: If the original coordinate
pair for the point A is (-5, 3), what is
the coordinate pair of A'?
The coordinate pair for A' is as a result (4, -2) in coordinated square.
After reflecting the square ABCD over the y-axis and translating it five units down and one unit to the left, we may use the following transformations in order to get the coordinate pair of A':
Across the y-axis, reflect the square: This modifies the x-sign coordinate's while maintaining the y-original coordinate's value. Hence, A's new coordinates would be (5, 3).
Five units down and one unit to the left, translate the square as follows: The y-coordinate is moved five units down and the x-coordinate one unit to the right as a result. A's new system coordinates are calculated to be (4, -2).
the coordinate pair for A' is as a result (4, -2).
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i NEED HELP THIS IS FOR 70 PERCENT OF MY GRADE, I DONT UNDERSTAND THIS. HELP
Part A:
For Column 1 : Line AB = Line BC: always true
For Column 2: Line AD = Line CD; sometimes true
For Column 3: Line BD is always vertical; never true
Part B: m< CBD is 20 degrees. Option A
How to determine the valueIt is important to note the properties of a circle, they are;
Equal chords of a circle are subtended in the same way at the center.The radius that is drawn perpendicular to the chord bisects the chord into equal halvesCircles that have different radius are similar.A circle can have other shapes circumscribed into it like a rectangle, trapezium, triangle, square, kite.From the information given, we have that;
m< BDA = 20 degrees
To determine the angle of m< CBD, we need to understand that alternating angles are angles that on a transversal and are equal to each other.
Then, if m<BDA = 20
m<CBD = 20 degrees
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OFFERING BRAINLIEST TO STEP BY STEP EXPLANATION
Answer:
[tex]112cm^2[/tex]
Step-by-step explanation:
Volume of a rectangluar prism = Length x Width x Height
Volume, Length, and Width is given now we can solve for Height, c
[tex]V = l * w * h[/tex]
[tex]80m^3 = 4m * 4m * h[/tex]
[tex]h = 80m^3 / 16m^2[/tex]
[tex]h = 5m[/tex]
Surface area of a rectangular prism is A = 2(wl +hl +hw)
[tex]A = 2(4m * 4m + 5m * 4m + 5m * 4m)[/tex]
[tex]= 2(16m^2 + 20m^2 + 20m^2)[/tex]
[tex]= 2(56cm^2)\\A= 112cm^2[/tex]
Hope this helps!
Brainliest is much appreciated!
supongo q es es 8 cm pero no creo q sería 2 o l
can you guys tell me what 2+2 is I cant figure it out
Answer:
really it's 4
Step-by-step explanation:
Answer:4
Step-by-step explanation: