Viewers with strong opinions about a current issue responding to a poll by a local news station

A) is an example of voluntary response bias.

Which of the following statements about bias is true? Bias...

B) produces samples that do not represent the population.

For a survey to find the average time students spend using the library at your school, use a

C) stratified random sample with grade level as the strata.

Which of the following distinguishes an observational study from an experiment? In an obs study

C) treatments are not randomly assigned.

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

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

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Duplicate of AP Statistics Sampling and Experimental Design

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10 multiple choice questions about sampling design and experimental design

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Answers

1
Viewers with strong opinions about a current issue responding to a poll by a local news station
A) is an example of voluntary response bias.
D) is an example of response bias.
B) is an example of nonresponse bias.
C) is an example of undercoverage bias.
2
A well-designed experiment should have which of the following characteristic(s)?
C) Replication.
A) Subjects assigned randomly to treatments.
B) A control group or at least two treatment groups.
D) All of these.
3
Which is the best way to compare the average ages of math and science teachers at your school?
A) Take a census.
C) Do an observational study.
D) Perform an experiment.
B) Use a sample survey.
4
Placebos are a tool for...
D) control
A) sampling
B) blocking
C) blinding
5
In an experiment the primary purpose of blinding is to reduce...
C) randomness.
B) confounding.
A) bias.
D) undercoverage.
6
Which of the following statements about bias is true? Bias...
D) All of these.
C) is usually reduced when the sample size is larger.
B) produces samples that do not represent the population.
A) results from random variation and will always be present.
7
For a survey to find the average time students spend using the library at your school, use a
B) stratified random sample with gender as the strata.
A) simple random sample.
D) cluster sample with grade level as the clusters.
C) stratified random sample with grade level as the strata.
8
Which of the following distinguishes an observational study from an experiment? In an obs study
A) volunteers are always used.
D) a control group is never used.
C) treatments are not randomly assigned.
B) a random sample is always taken.
9
Which is the best way to collect data on the ease of using a new Internet search engine?
D) experiment
C) observational study
A) census
B) sample survey
10
To test the effectiveness of a new SAT prep course, which experimental design is best?
B) A randomized block design using student GPA as the blocks
C) A randomized block design using gender as the blocks
D) A randomized block design using PSAT score as the blocks
A) A completely randomized design

Duplicate of AP Statistics Sampling and Experimental Design Flashcards | StudBud