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AP Statistics CH4 Flashcards | StudBud
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AP Statistics CH4
AP Statistics CH4
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1
Review:The lifespan of all microwaves sold in the US is ~N(9, 2.5) What percentage of the ovens last more than 10 years?
40%
60%
65.5%
34.5%
2
A Simple Random Sample of size n
Is the method used when you break your population into subgroups first
gives every set of n individuals an equal chance of being selected
gives every set of n individuals an unequal chance of being selected
Is a biased sampling method
3
SRS stands for
Systematic Random Sample
Stratified Random Sample
Simple Random Sample
Same Random Sample
4
The previous question (selecting 3 stores) is an example of
Cluster Sample
Stratified Random Sample
Convenience Sample
Simple Random Sample
5
You are designing an experiment to see if an SAT prep course improves SAT scores. A confounding variable is:
What kind of car each student drives.
Amount of time students study with or without the SAT prep course.
Each student's favorite movie
6
What are the first 3 numbers in line 125 of Table D
125
967
123
192
7
To survey residents of a 50 story apartment building you randomly select 3 floors and ask all residents on those floors
This is an example of a stratified random sample
This is an example of a simple random sample
This is an example of a convenience sample
This is an example of a cluster sample
8
If you randomly assign your treatments in an experiment then you can
Conclude Cause and Effect
Generalize about the population no matter how you selected your sample.
Do nothing because this is not an experiment
Not conclude cause and effect
9
At a high school you survey a random sample of students by randomly selecting students from each grade.
This is an example of a simple random sample
This is an example of undercoverage
This is an example of a stratified random sample
This is an example of a cluster sample
10
This occurs when some groups in a population are left out of the process of choosing a sample
Undercoverage
Cluster Sample
A sample that is too small
Overcoverage
11
A pill that looks like aspirin, but has no active ingredient is an example of
a confounding variable
a placebo
a lurking variable
used only in a matched pairs design
12
Which of the following is NOT a major principle of ALL experimental design?
Random
Replication
Blocking
Control
13
Using table D, starting at line 130, pick 3 stores
03, 9, 19
5, 6, 9
6, 9, 20
05, 16, 17
14
When you sample all individuals of a population this is called
Cluster Sample
Census
Random Sample
Overcoverage
