Suppose That,on Average,electricians Earn Approximately Dollars Per Year in the United

Multiple Choice

Suppose that,on average,electricians earn approximately dollars per year in the United States.Assume that the distribution for electrician's yearly earnings is normally distributed and that the standard deviation is dollars. Refer to Exhibit 7-2.What is the probability that the average salary of four randomly selected electricians is more than $50,000 but less than $60,000?

A) 0.5899
B) 0.7486
C) 0.8413
D) 0.9048