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An observational study is retrospective if it considers only existing data. It is prospective if the study design calls for data to be collected as ti

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asked 2021-06-25
An observational study is retrospective if it considers only existing data. It is prospective if the study design calls for data to be collected as time goes on. Tell which of the following observational studies are retrospective and which are prospective. To see whether crime mes are related to moon phase, a researcher looks at ten years of archived police blotter reports and compares them with moon charts from the same period.

Answers (1)

2021-06-26
Retrospective: data are collected from the past by going back in time Prospective: data are collected in the future
The data is collected by looking at ten years of archived reports and moon charts of the same period.
However, archived reportsare reports from the past and thus the observational study is retrospective.
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