Out of a sample of 94 purchases at the drive-up window of a fast-food establishment, 27 were
Question:
(a) Estimate the proportion of sales made with a credit card.
(b) Obtain the estimated standard error.
(c) Find a 98% confidence interval for the population proportion of purchases paid with a major credit card.
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Let p population proportion of all driveup window ...View the full answer
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Related Book For 
Statistics Principles And Methods
ISBN: 9780470904114
7th Edition
Authors: Richard A. Johnson, Gouri K. Bhattacharyya
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