Retailers report that the use of cents-off coupons is increasing. The Scripps Howard News Service (July 9,
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Retailers report that the use of cents-off coupons is increasing. The Scripps Howard News Service (July 9, 1991) reported the proportion of all households that use coupons as .77. Suppose that this estimate was based on a random sample of 800 households (i.e., n = 800 and p = .77). Construct a 95% confidence interval for π, the true proportion of all households that use coupons.
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Related Book For 
Introduction To Statistics And Data Analysis
ISBN: 9780495118732
3rd Edition
Authors: Roxy Peck, Chris Olsen, Jay L. Devore
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