One year, professional sports players salaries averaged 1.6 million with a standard deviation of .7 million. Suppose a sample of 100 major league players was taken. Find the approximate probability that the average salary of the 100 players exceeded 1.1 million.

Question

One year, professional sports players salaries averaged 1.6 million with a standard deviation of .7 million.  Suppose a sample of 100 major league players was taken.  Find the approximate probability that the average salary of the 100 players exceeded 1.1 million.

PsyDAG · Answer

Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.