How would collect data in prospective observational study

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Reference no: EM131411496

Suppose you want to know whether men or women spend more time talking on a cell phone during a week's time.

a. Describe how you would collect the data in a retrospective observational study.

b. Describe how you would collect the data in a prospective observational study.

c. Refer to parts (a) and (b). Give one disadvantage for each method of collecting the data in this situation.

Reference no: EM131411496

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