Term
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Definition
| Is conducted using pre-existing data |
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Term
| Retrospective(observation Study) |
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Definition
| if it studies an outcome in the present by examining historical records |
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Term
| Prospective (observational Study) |
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Definition
| seeks to identify subjects in advance and collects data as events unfold |
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Term
| Key features distinguish an experiment form other investigations |
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Definition
1. The experimenter actively and deliberatley manipulates the factors to specify a treatment.
2. The experiment assigns subjects to the treatments randomly. |
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