Business, 21.03.2020 09:44 laxraAragon
A marketing researcher for a phone company surveys 100 people and finds that the proportion of customers who are likely to switch providers when their contract expires is 15% 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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A marketing researcher for a phone company surveys 100 people and finds that the proportion of custo...
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