Suppose Apple claims that the average wait time for a customer calling the Apple Care support line

Question:

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.

AppendixLO1

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Business Statistics

ISBN: 9780133852288

2nd Edition

Authors: Robert A Donnelly, Robert Donnelly Jr

Question Posted: