For the following observational studies, indicate whether they are prospective or retrospective. a) A company looked at
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For the following observational studies, indicate whether they are prospective or retrospective.
a) A company looked at a sample of returned registration cards to estimate the income level of households that purchased its product.
b) A retail outlet encouraged customers to join its “frequent buyers” program and studied whether those who joined were more likely to make use of discount coupons than those who were not members.
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Related Book For
Business Statistics
ISBN: 9780133899122
3rd Canadian Edition
Authors: Norean D. Sharpe, Richard D. De Veaux, Paul F. Velleman, David Wright
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