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
___________________ happens when some members of the population are left out or cannot be chosen for the sample.
undercoverage
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20
When the population is broken up into groups and a SRS of groups is chosen and all of those group members are in the sample, this is called a _____________ sample.
cluster
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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
Some experiments give a ____________ (fake treatment).
placebo
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seesaw
Swap points!
Oops!
shark
Other team loses 25 points!
Okay!
rocket
Go to first place!
Okay!
thief
Give points!
5
10
15
20
25
20
In an ____________ study, no treatment is administered.
observational
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baam
Lose 5 points!
Oops!
gift
Win 25 points!
Okay!
rocket
Go to first place!
Okay!
lifesaver
Give 15 points!
Oops!
20
The idea that different random samples of the same size from the same population will produce different results
Sampling variability
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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
True or False? In a randomized block design, comparisons are made at the end of the experiment that compare one blocks results to other blocks results.
False
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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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15
_____________ means that neither the subjects nor those interacting with them know who is receiving each treatment.