A random sample of 441 shoppers revealed that 76% made at least one purchase at a discount
Question:
A random sample of 441 shoppers revealed that 76% made at least one purchase at a discount store last month.
a. Based on this sample information, what is the 90%
confidence interval for the population proportion of shoppers who made at least one discount store purchase last month?
b. The city of San Luis Obispo, California, has a population of 35,000 people. Referring to part a, determine a 90% confidence interval for the number of shoppers who made at least one discount store purchase last month.
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Related Book For 
Business Statistics A Decision Making Approach
ISBN: 9780136121015
8th Edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry, Kent D. Smith
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