A manufacturer who is considering the implementation of a one-week training program for all new employees decides to test the program with the next 100 employees hired, and then compare their productivity rate to the productivity rate of new employees based on past records—a rate that is normally distributed with a mean of 60 and a standard deviation of 8. The new program needs to produce a minimum improvement of 4 to be considered worthwhile.
-What is the predicted mean of the experimental distribution?
A)52
B)60
C)64
D)100

Question

Quizplus · Accepted Answer

Since the new training program is expected to produce a minimum improvement of 4, we can assume that the mean of the new distribution will be shifted to the right by 4. Therefore, the predicted mean of the experimental distribution will be the original mean (60) plus the shift (4), which equals 64. Therefore, the best choice is C.

A Manufacturer Who Is Considering the Implementation of a One-Week