1) Problem #PRAJ5ZN "PRAJ5ZN - 264007 - Problem #264007" |
A)
Calculate the slope of the least squares regression line that has the statistics found below. Round answer to the nearest hundredth.
For help, click here for the AP Statistics formula sheet. © STATS4STEM.ORG |
B)
Calculate the y-intercept of the least squares regression line that has the statistics found below. Round answer to the nearest hundredth. |
C)
Calculate y-hat when x=1. Round answer to the nearest hundredth. |
D)
If y = 0, when x = 1. Calculate the residual. |
E)
Calculate y-hat when x=4. Round answer to the nearest hundredth. |
F)
If y = -2, when x = 4. Calculate the residual. |
G)
The direction of this linear regression line is: |
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2) Problem #PRAJ74B "PRAJ74B - 266012 - The following box..." |
A)
The following boxplots represent the fuel efficiency of different types of cars in miles per gallon. Which type of car has the greatest median? © STATS4STEM.ORG |
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B)
The 75th percentile is least for which car type? |
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C)
Below is a numerical summary of the MPG.city data for small cars.
Based on the data above, any number that is found to be greater than what number will be considered an outlier? In other words, what is the upper threshold number that should be used to determine if a number is an outlier or not. Round answer to the nearest hundredth. |
D)
Below is a numerical summary of the MPG.city data for large cars.
Based on the data above, any number that is found to be lower than what number will be considered an outlier? In other words, what is the lower threshold number that should be used to determine if a number is an outlier or not. Round answer to the nearest hundredth. |
3) Problem #PRAJBPN "PRAJBPN - 239672 - The area under al..." |
The area under all density curves is equal to what? © STATS4STEM.ORG |
4) Problem #PRAFF7T "PRAFF7T - Confidence Intervals - EJS" |
As we seek to increase our confidence level (while keeping sample size constant), the margin of error: © STATS4STEM.ORG |
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5) Problem #PRAJQ5V "PRAJQ5V - 251645 - Which equation is..." |
Which equation is used to calculate confidence intervals for proportions? A. B. C. D. © STATS4STEM.ORG |
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6) Problem #PRAEH2M "PRAEH2M - Probability - General Addition Rule - EJS" |
The probability that a wizard owns a broom is 0.75, that a wizard owns a wand is 0.35, and that a wizard owns both a broom and a wand is 0.20. Calculate the probability that a wizard owns either a broom or wand. Round answer to the nearest hundredth. © STATS4STEM.ORG |
7) Problem #PRAJQQR "PRAJQQR - 251238 - In the United Sta..." |
A)
In the United States, about 17% of the people have blue eyes. Suppose 200 people from this city were sampled. As a decimal, what is the mean of the sampling distribution of p-hat? © STATS4STEM.ORG |
B)
Have the required conditions been met to use the normal approximation for p-hat? Hint: Make sure you remember these requirement and always use them before assuming normality. |
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C)
Which distribution can be used to approximate the sampling distribution of p-hat? |
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D)
What is the probability p-hat will be less than .15? Answer as a decimal rounded to nearest hundred. Link to z-table |
E)
What is the probability p-hat will fall between .13 and .19? Round answer to the nearest hundredth. |
F)
What is the probability p-hat will be greater than .20? Round answer to the nearest hundredth. |
G)
What is the probability p-hat will be less than .14 or greater than .18? Round answer to the nearest hundredth. |
8) Problem #PRAJNDQ "PRAJNDQ - STATS4STEM" |
A)
A and B are independent. P(A) = 0.22 and P(B) = 0.24 Calculate P(A or B). Round answer to the nearest hundredth. © STATS4STEM.ORG |
B)
Event G & F are independent. P(F|G) = 0.24 and P(G) = 0.35 Calculate P(F). Round answer to the nearest hundredth. |
C)
P(D|E) = 0.6 and P(Ec) = 0.3 Calculate P(D and E) |
9) Problem #PRAKFGU "PRAKFGU - 273127 - _________________..." |
___________________ is the arranging of experimental units or subjects into different groups so that the experimental units or subjects are similar to one another. This is done under the belief that the response to the treatment may potentially be different for the different groups. © STATS4STEM.ORG |
10) Problem #PRAFHHZ "PRAFHHZ - STATS4STEM.ORG" |
What is t* for a 80% Confidence Interval where the sample size is 57? *** Give answer EXACTLY as found in the t-table (three decimal places).*** Click here for a t-table. © STATS4STEM.ORG |
11) Problem #PRAJKFX "PRAJKFX - STATS4STEM" |
A)
Review the different t-distribution density curves above. Are all t-distribution density curves centered at 0? © STATS4STEM.ORG |
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B)
As the degrees of freedom increase, we can say that: |
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C)
Is the following statement true or false? The only parameter that needs to be defined for the t-distribution is the degrees of freedom (df). This is unlike the Normal Distribution. The Normal Distribution requires two parameters to be defined: μ and σ . |
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