Observational studies that examine existing data are called ______________.
retrospective
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5
A census collects data from everyone in the ___________________.
population
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20
In an ____________ study, no treatment is administered.
observational
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lifesaver
Give 25 points!
Oops!
rocket
Go to first place!
Okay!
fairy
Take points!
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25
banana
Go to last place!
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eraser
Reset score!
Oops!
star
Double points!
Okay!
fairy
Take points!
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25
baam
Lose 25 points!
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20
True or false? Subjects are randomly placed in blocks.
False
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15
In a __________sample, you choose individuals that are easiest to reach.
Convenience
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20
When the population is broken up into groups and a SRS is chosen from each group, this is called a __________________ sample.
stratified
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10
True or false? Random selection allows us to make inferences about cause and effect.
False
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20
In this type of design, experimental units that are similar with respect to a variable that is expected to have an affect on the response are grouped together.
randomized block design
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20
___________________ happens when some members of the population are left out or cannot be chosen for the sample.
undercoverage
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boom
Lose 50 points!
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gift
Win 20 points!
Okay!
fairy
Take points!
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25
lifesaver
Give 25 points!
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10
Experiments impose one or more ______________.
treatments
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20
In this type of design, experimental units are assigned to treatment groups completely at random.
Completely randomized design
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25
True or false? Random selection allows us to make inferences about the population.