A wholesaler assures retailer replacement times for TVs normally dist. with mean of 8.2 and s.d. of 1.1. The retailer finds that a random sample of 20 sets from the wholesaler have mean replacement time of 7.6 years. Find P of getting a sample of 20 TVs with a mean replacement time of 7.6 years or less.
Is wholesaler trustworthy?
Please see the attached Word document for calculations and explanation of this exercise.
First, organize the information given in the problem.
The question is: ...
This solutions finds the probability of an event related to a sample mean by applying the central limit theorem.