Which of these describes an advantage of using blocking in an experiment?

It reduces the variability due to differences between blocks.

It allows a conclusion of cause and effect.

It ensures that treatments are assigned randomly.

A one-sided hypothesis test is to be performed with an significance level of .05. Suppose that the null hypothesis is false. If the significance level of .01 were to be used instead of .05, which of the following is true.

The probability of a Type II error would increase and the power of the test would decrease

The probability of a Type I error would increase and the power of the test will decrease

Both the probability of Type II error and power of the test will increase.

The probability of a Type II error would increase and the power of the test would increase

Does there appear to be a relationship between volunteerism and literacy level?

Yes, the corresponding segments of the three bars have different heights

No, the corresponding segments of the three bars have different heights

No,the sums of the 3 proportions in each bar are identical.

Yes, all three bars have the same height.

An AP Statistics class surveys 24 randomly selected female students from their high school, and calculates a 95% confidence interval for the mean height of female students to be 63.4±1.6 inches. Which of the following is a correct interpretation of this interval?

We are 95% confident that the true mean height of female students at the school is between 61.8 and 65.0 inches.

There is a 95% probability that the true mean height of female students at the school falls between 61.8 and 65.0 inches.

There is a 95% probability that the true mean height of female students at the school is 63.4 inches.

We can be 95% confident that the true mean height of female students at the school is 63.4 inches.

H 0 H_0 H 0 = μ n − μ h = 0 \mu_n-\mu_h=0 μ n − μ h = 0 , H a = μ n − μ h H_a=\mu_n-\mu_h H a = μ n − μ h where μ n \mu_n μ n is the true mean number of fouls called during games played at neutral sites and μ h \mu_h μ h is the true mean number of fouls called during games played at the home team’s stadium with a resulting P-value of 0.24. Which of the following is an accurate interpretation of this P-value?

If the null hypothesis is true, there is a 24% probability of getting a sample difference in means as far or farther below 0 as the difference found in the samples.

There is a 24% probability that the null hypothesis is true.

If the null hypothesis is false, there is a 24% probability of getting a sample difference in means as far or farther below 0 as the difference found in the samples.

If the test were repeated many times, we would incorrectly fail to reject the null hypothesis 24% of the time.

An advertiser wants to find convincing evidence that television viewers remember more than 4 commercials, on average, after watching a 30 minute TV program. They take a random sample of 100 television viewers and ask them how many commercials they could remember after watching a 30 minute TV program. The appropriate t-test was conducted, which resulted in a P-value of 0.15. Assuming all conditions were met, which of the following is an appropriate conclusion?

Because the P-value is greater than 0.01, at the 1% significance level, there is not convincing evidence that television viewers remember more than 4 commercials, on average, after watching a 30 minute TV program.

Because the P-value is greater than 0.01, at the 1% significance level, there is convincing evidence that television viewers remember exactly 4 commercials, on average, after watching a 30 minute TV program.

Because the P-value is greater than 0.05, at the 5% significance level, there is convincing evidence that television viewers remember fewer than 4 commercials, on average, after watching a 30 minute TV program.

Because the P-value is less than 0.05, at the 5% significance level, there is not convincing evidence that television viewers remember more than 4 commercials, on average, after watching a 30 minute TV program.

AP Stats Review

Authored by Jason Gong

Mathematics

9th - 12th Grade

CCSS covered

Used 8+ times

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19 questions

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MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which measures of center and variability would be most appropriate to describe the given distribution?

Median and IQR

Mean and IQR

Median and Range

Mean and Standard Devation

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements are true?

Histograms have gaps between each bar.

Stemplots are the best graphs for displaying data sets with two variables.

Boxplots clearly show the five-number summary of a data set.

Bar graphs can display both quantitative and categorical data.

FILL IN THE BLANK QUESTION

1 min • 1 pt

What is the expected number of packs a customer purchases?(X=number of packs a customer buys)

Tags

CCSS.HSS.MD.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is the best estimate of the value of the residual for the point indicated by the arrow?

-60

-55

Tags

CCSS.HSS.ID.B.6B

FILL IN THE BLANK QUESTION

2 mins • 1 pt

How large a sample should be taken to find the answer to within ±3% at the 95% confidence level? (z-interval)

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which proportions represent the conditional distribution of grade for children who preferred an action feature?

0.368 and 0.632

0.444 and 0.556

0.529 and 0.471

0.194 and 0.333

Tags

CCSS.8.SP.A.4

FILL IN THE BLANK QUESTION

30 sec • 1 pt

What is the probability that a student has a GPA under 2.0 or has skipped many classes?

Tags

CCSS.HSS.CP.B.7

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AP Stats Review

Which measures of center and variability would be most appropriate to describe the given distribution?

Which of the following statements are true?

What is the expected number of packs a customer purchases?(X=number of packs a customer buys)

Which of the following is the best estimate of the value of the residual for the point indicated by the arrow?

How large a sample should be taken to find the answer to within ±3% at the 95% confidence level? (z-interval)

Which proportions represent the conditional distribution of grade for children who preferred an action feature?

What is the probability that a student has a GPA under 2.0 or has skipped many classes?

Which of these describes an advantage of using blocking in an experiment?

A one-sided hypothesis test is to be performed with an significance level of .05. Suppose that the null hypothesis is false. If the significance level of .01 were to be used instead of .05, which of the following is true.

Amy's score of 31 was at the 98th percentile. If the mean of the test scores was 20, the standard deviation was about

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