Suppose That, on Average, Electricians Earn Approximately µ = $54,000

Multiple Choice

Suppose that, on average, electricians earn approximately µ = $54,000 per year in the United States. Assume that the distribution for electricians' yearly earnings is normally distributed and that the standard deviation is σ = $12,000. What is the probability that the average salary of four randomly selected electricians exceeds $60,000?

A) 0.1587
B) 0.3085
C) 0.6915
D) 0.8413