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Definition
| observes individuals and measures variables of interest but does not attempt to influence the responses |
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Term
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Definition
| deliberately imposes some treatment on individuals to measure their responses |
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Term
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Definition
| occurs when 2 variables are associated in such a way that their effects on a response variable cannot be distinguished from each other |
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Term
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Definition
| a specific condition applied to the individuals in an experiment |
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Term
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Definition
| the smallest collection of individuals to which treatments are applied |
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Term
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Definition
| the individuals being treated are human |
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Term
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Definition
| experimental units are assigned to treatments using a chance process |
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Term
| completely randomized design |
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Definition
| the experimental units are assigned to the treatments completely by chance |
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Term
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Definition
| neither the subjects nor those who interact with them and measure the response variable know which treatment a subject received |
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Term
| statistically significant |
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Definition
| an observed effect so large that it would rarely occur by chance |
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Term
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Definition
| a group of experimental units that are known before the experiment to be similar in some way that is expected to affect the response to the treatments |
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Term
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Definition
| the random assignment of experimental units to treatments is carried out separately within each block |
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