A marketing researcher for a phone company surveys 100 people and finds that the proportion of customers
Question:
a) What is the standard deviation of the sampling distribution of the proportion?
b) If she wants to reduce the standard deviation by half, how large a sample would she need?
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Related Book For
Stats Data And Models
ISBN: 662
4th Edition
Authors: Richard D. De Veaux, Paul D. Velleman, David E. Bock
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