AP Statistics Review

Question 1

Which of the following is not important in the design of a good experiment?

Accepted Answer

Replicate the experiment many times

Question 2

Experimental Design

Accepted Answer

A Matched Pair Experiment

Question 3

The spread of a sampling distribution is the ______________ of the statistic.

Accepted Answer

variability

Question 4

Two essential features of all designed experiments are

Accepted Answer

use enough subjects, compare treatments

Question 5

What is the “formula” for the lower cutoff for an outlier as defined by a modified box plot?

Accepted Answer

Q1 – 1.5IQR

Question 6

Which of the following is resistant?

Accepted Answer

Median & IQR

Question 7

In a 4 X 3 two-way table, the number of degrees of freedom is

Accepted Answer

6

Question 8

To test the effectiveness of a new SAT prep course, which experimental design is best?

Accepted Answer

D) A randomized block design using PSAT score as the blocks

Question 9

Which formula to determine CENTER of Sampling Distribution?

Accepted Answer

μ_{\overline{x}}=μ

Question 10

Which type of plot best determines whether or not a linear model is appropriate?

Accepted Answer

Residual plot

Question 11

To reduce the variability of the sampling distribution, __________ the _________________.

Accepted Answer

increase, sample size

Question 12

What is the probability?

Accepted Answer

6/10, 3/5

Question 13

Name the sampling method.

Accepted Answer

SRS

Question 14

If a distribution has data mostly on the left with a few points spread far to the right, it is

Accepted Answer

skewed to the right and the mean is greater than the median.

Question 15

The power of the test would be greatest for which sample size (n) and significance level (α)?

Accepted Answer

n = 30, α = 0.05

Question 16

Which of the following is an example of qualitative data?

Accepted Answer

Zip code

Question 17

What are the conditions for a binomial distribution?

Accepted Answer

BINS

Question 18

Which of the following is a parameter?

Accepted Answer

sigma

Question 19

Which of the following is not a condition for a geometric distribution?

Accepted Answer

fixed number of trials

Question 20

Blocking in an experimental design is used primarily to ___________

Accepted Answer

reduce the within-treatment variation

Question 21

A researcher plans to obtain a random sample of heads of households from each of 23 counties.

Accepted Answer

This is a stratified sample

Question 22

Which of the following is part of the 5 number summary?

Accepted Answer

Median

Question 23

The purpose of sampling is

Accepted Answer

studying a part in order to gain information about the whole

Question 24

What is the standard deviation of a sampling distribution called?

Accepted Answer

Standard error

Question 25

Which of the following is the conditions check for normally for proportions?

Accepted Answer

Choice (B) and (C)

Question 26

Calculate the Standard Error of the Sampling distribution

Accepted Answer

SE p̂1 - p̂2 = 0.0289

Question 27

If a distribution is skewed right which of the following is true

Accepted Answer

the mean would be most likely greater than the median

Question 28

What is the formula for finding a residual?

Accepted Answer

observed - expected

Question 29

Name the sampling method.

Accepted Answer

Voluntary Response

Question 30

Which formula to determine SPREAD of Sampling Distribution?

Accepted Answer

σ_{p-hat}=\sqrt{\frac{p\left(1-p\right)}{n}}

Question 31

What is stratified sampling?

Accepted Answer

Dividing the population into homogeneous groups

Question 32

Type of sampling?

Accepted Answer

Cluster

Question 33

Conditional Probability

Accepted Answer

5/6

Question 34

You toss a fair coin 4 times. What is the probabilty that you get at least 1 tails?

Accepted Answer

0.9375

Question 35

What is a sampling distribution?

Accepted Answer

An average of means from data.

Question 36

Experimental Design

Accepted Answer

Randomizing helps make 2 groups similar as possible

Question 37

Name the sampling method.

Accepted Answer

Stratified

Question 38

Which of the following is a statistic?

Accepted Answer

SEb

Question 39

If all other information for a CI is the same except for the confidence level, which is true?

Accepted Answer

A 90% CI is narrower than a 95% CI.

Question 40

Different samples are likely to produce different statistics for the same population

Accepted Answer

sampling variability

Question 41

Why is randomization one of the four principles of experimental design?

Accepted Answer

Randomization equalizes the effects of unknown/uncontrollable variation.

Question 42

A stratafied experiment design is referrered to as?

Accepted Answer

Blocking

Question 43

Given nonempty events A and B, what does it mean when events A and B are mutually exclusive?

Accepted Answer

Events A and B do not have any common outcomes.

Question 44

What test would you use to see if there is a relationship between GPA and SAT score?

Accepted Answer

Linear Regression t-Test

Question 45

Which is the correct interpretation of a normal probability plot?

Accepted Answer

Approximately linear so approximately normal.

Question 46

What is the sugar pill called given to the control group in experiments?

Accepted Answer

Placebo

Question 47

Which of the following represent the sampling distribution mean and standard error?

Accepted Answer

μẋ=μ; σẋ=σ /√n

Question 48

Normal Distribution

Accepted Answer

0.6796

Question 49

Which of the following numbers is not part of the Empirical Rule?

Accepted Answer

90

AP Statistics Review

Questions 49

AP Statistics Review

Questions 49