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Suppose Apple claims that the average wait time for a

Suppose Apple claims that the average wait time for a customer calling the Apple Care support line is 175 seconds. A random sample of 40 customers had an average wait time of 187 seconds. Assume the population standard deviation for wait time is 50 seconds.

a. Using a 95% confidence interval, does this sample support Apple’s claim?

b. Verify your results with Excel.

a. Using a 95% confidence interval, does this sample support Apple’s claim?

b. Verify your results with Excel.

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