b. Identify the type of observational study (retrospective, cross-sectional, pro

Question

b. Identify the type of observational study (retrospective, cross-sectional, prospective): A media research company surveys 1,000 households to determine the proportion of households watching Good Morning America A medical student investigates the effects of smoking on the weight of newborn babies by examining data from the past five years available at the MGH. . . The Centers for Disease Control plans to obtain data on the number of flu cases by following all reported cases during the upcoming year in all states

Explanation / Answer

Proportion of households watching Good Morning America - Cross sectional study (A sample is selected from the population and the experiment/study is done as the event occurs.

Effect of smoking on weight - Retrospective study (data of past is used)

Number of flu case - Prospective study (aimed at studying future events)

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