The president of a breakfast cereal manufacturer believe that her product is very popular in families where
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The president of a breakfast cereal manufacturer believe that her product is very popular in families where both spouses work. To prove her point, she commissioned a survey of families where both spouses work. Each family was asked whether the company’s cereal is eaten for breakfast. Of those families surveyed, 65.9% indicated they eat the cereal. The plan was to develop a 97.5% confidence interval for the proportion of families with two work¬ing spouses who eat the cereal. What is the maximum sample size of families that should have been surveyed if the estimate was to be within 1.95% of the true proportion?
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