An NCAA Study Reported That the Average Salary of the 300

Multiple Choice

An NCAA study reported that the average salary of the 300 major college football coaches is $1.47 million. Using a random sample of 30 coaches and a population standard deviation of $300,000, what is the probability that the sample mean is between $1.4 million and $1.5 million per year?

A) 0.7754
B) 0.6829
C) 0.9159
D) 0.8660