Which of the following is FALSE?

A Population is used to make an inference about a Sample.

Why should we rely on random sampling?

Probability allows trustworthy inference, To eliminate bias

If a result is "statistically significant" it

Probably didn't happen by chance.

What is the control group?

A group that receives no treatment or an existing treatment

If I wanted to choose a random sample of jelly beans but the same number of each color I would

perform a stratified random sample

I conduct phone interview to ask about Spiderman however 30 of 40 people don't pick up. This

Nonresponse, Poorly worded question, Undercoverage

Which of the following is a good reason NOT to use a census?

It measures results from the entire population

You can NOT establish causation when

Larger values are associated with weaker responses

Mr. Barber can't decide whether to shave his goatee. Which is not a convenience sample?

Conducting an SRS within his 4th period class

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AP Statistics Chapter 4 Practice

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Questions 15

Answers

1
An online survey asks if Iron Man or Ultron would win in a fight. This is an example of
convenience sample
stratified random sample
voluntary response sample
simple random sample
2
Which of the following is FALSE?
A Sample should be chosen at random to avoid bias.
A Sample is part of a Population.
Samples are used to make inferences about a Population.
A Population is used to make an inference about a Sample.
3
Why should we rely on random sampling?
Probability allows trustworthy inference
To eliminate bias
He is my good friend
We should not rely on random sampling
4
What is the best way to choose experimental units?
Random assignment
Simple Random Sample
Control group
Stratified random sample
5
If a result is "statistically significant" it
Requires statistics to understand.
Probably didn't happen by chance.
Is a randomized experiment.
Shows an association.
6
What is the control group?
The group that gives the treatment
The group that receives treatment
A method for keeping track of results in an experiment
A group that receives no treatment or an existing treatment
7
If I wanted to choose a random sample of jelly beans but the same number of each color I would
perform a stratified random sample
perform a simple random sample
use a table of random digits
eat them
8
I experiment on dogs to see which food makes them behave best. Which is the experimental unit?
Experimenter
Type of food
Dog
Behavior level
9
What does it mean when an experiment is "double-blind"?
The experimenters are blind.
The results don't make sense.
none of the other answers.
There is a placebo group.
10
When you impose a treatment on a sample this is a(n)
Experiment
Observational Study
11
I conduct phone interview to ask about Spiderman however 30 of 40 people don't pick up. This
Nonresponse
Poorly worded question
Response bias
Undercoverage
12
Which of the following is a good reason NOT to use a census?
It measures results from the entire population
In destructive sampling, all the results would be the same
Nobody would participate in a Census.
There is no reason to not use a census.
13
Confounding is caused by
Lurking variables
Having a control group
Response bias
Those meddling kids
14
You can NOT establish causation when
The association is consistent
The cause precedes the effect in time
Larger values are associated with weaker responses
The association is strong
15
Mr. Barber can't decide whether to shave his goatee. Which is not a convenience sample?
Asking the first 12 students who arrive to school one day
Asking his family
Conducting an SRS within his 4th period class
Asking the members of the Goatee Appreciation Club

AP Statistics Chapter 4 Practice Flashcards | StudBud