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.Given a sample of four electricians,what is the standard deviation for the sampling distribution of the sample mean?

A) 6,000
B) 12,000
C) 36,000
D) 54,000