You Heard That the Average Number of Years of Experience

Multiple Choice

You heard that the average number of years of experience among stockbrokers is 14 years.You can't remember the standard deviation somebody with 8 years' experience has a z-score of -2.Find the standard deviation.

A) 3 years
B) 9 months
C) 6 months
D) 9 years
E) 3 months