AP Stats Review

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

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.

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

Tags

CCSS.HSS.MD.A.2

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

• -60

• 55

• 60

• -55

Tags

CCSS.HSS.ID.B.6B

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?

• 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

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

Tags

CCSS.HSS.CP.B.7

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 increases the sample size.

• It ensures that treatments are assigned randomly.

Tags

CCSS.HSS.IC.B.3

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 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 decrease

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

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

• 5.6

• 5.5

• 6

• 5.4