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12 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Observational Study |
Observe outcomes without imposing any treatment |
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Experiment |
Actively imposing treatment in order to observe the response |
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Experimental unit |
The single individual to which the treatments are assigned |
Person, animal, plant, etc. |
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Factor |
Explanatory variable |
What are you testing? |
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Level |
Specific value for the factor |
Type A, Type B, Type C, etc. |
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Response variable |
What you measure |
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Treatment |
Specific experimental condition applied to the units |
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Control group |
A group that is used to compare the factor against |
Can be a placebo or the "old" or current, also known as a comparison group |
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Placebo |
A "dummy" treatment that can have no physical effect |
Sugar pill |
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Blinding |
Method used so that units don't know which treatment they get |
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Double blind |
Neither the units nor the evaluator know which treatment the subject got |
Medical testing |
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Confounding variable |
The effect of confounding variable on the response can't be separated from the effects of the explanatory variable (factor) |
Completely random has NO confounding variable |
