Question: The marketing director at Homecare Products wants to measure the
The marketing director at Homecare Products wants to measure the response of customers to the company’s new cinnamon flavored toothpaste. Suppose she plans to take a simple random sample of customers and wants a margin of error no larger than .02 for a proposed 90% confidence interval estimate of the proportion of customers overall who would like the new flavor. How large a sample would you recommend? Assume you have no prior information about the likely population proportion.
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