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AP Statistics Chapter 4 Flashcards | StudBud
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AP Statistics Chapter 4
AP Statistics Chapter 4
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1
Who knows what is happening in a double-blind experiment?
Subjects
Neither
Both
Those who interact with the subjects
2
The part of the population we actually draw information from is called...
Sample
Individual
Population
Census
3
The most important advantage of experiments over observational studies is that...
Experiments are easier to carry out
An observational study cannot have a response variable
Confounding cannot happen in experiments
Experiments can give better evidence of causation
4
A group of workers play their music for a month. For another month, without music. What design?
Matched pairs
Block design
Observational study
Impossible to classify
5
Identify pop. A member wants to know if constituents support offer. 228 letter were received.
228 letters
All constituents opinions
None of the above
A member
6
When an untreated subject incorrectly believes he or she received a treatment...
Confounding
Placebo effect
Double-blind
Single-blind
7
The 4 rules of experimental design: comparison, random assignment, control, treatment. T or F?
False
True
8
A "pair" in what type of design consists of a single unit that receives both treatments?
Double-blind
Matched pairs
Randomized block
Completely randomized
9
Control groups are used in experiments in order to accomplish which of the following?
Reduce variability
Make sure someone other than investigator control experiment
Control subjects of study to ensure all participate equally
Limit the effects of variables other than the explanatory
10
Which are part of the basic data ethics?
All of the above
Review board
Informed consent
Confidentiality
11
Which type of sample? A researcher selects the 24th person. Then every 50th person after that
Cluster sampling
Voluntary response sampling
Stratified random sampling
Systematic sampling
12
Which of the following causes error in sample surveys?
SRS
nonresponse
undercoverage
wording of the question
13
In this type of sample, separate random samples are independently selected from each subgroup
Systematic sampling
Cluster sampling
Stratified random sample
Voluntary response sample
14
How do you make inference about the population and cause and effect?
Randomly selected but not randomly assigned
Not randomly selected nor randomly assigned
Not randomly selected but randomly assigned
Randomly selected and randomly assigned
15
30 students. Draw an SRS of 5 students using 14459 26056 31424 80371 65103 62253 22490 61181
14, 31, 03, 10, 22
14, 45, 92, 60, 56
14, 03, 10, 22, 22
14, 03, 10, 22, 11
