Question: In a customer satisfaction survey a random sample of 635 customers were asked their opinion on the service they received. A total of 485 of

In a customer satisfaction survey a random sample of 635 customers were asked their opinion on the service they received. A total of 485 of these customers replied that they were very satisfied.
(a) Construct a two-sided 05'/ confidence interval for the proportion of customers that are very satisfied.
(b) Is it safe to conclude that overall at least 75% of the customers are very satisfied? Use an appropriate hypothesis test.

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a p 485635 0764 With z 0025 1960 the confidence interval is 0764 196063... View full answer

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