The Mean Gross Annual Incomes of Certified Tack Welders Are

The mean gross annual incomes of certified tack welders are normally distributed with the mean of
$50,000 and a standard deviation of $4,000. The ship building association wishes to find out
Whether their tack welders earn more or less than $50,000 annually. The alternate hypothesis is
That the mean is not $50,000.
Which of the following is the alternate hypothesis?

A) p ≠ $50,000
B) μ ≠ $50,000
C) μ < $50,000
D) μ = $50,000
E) p = $50,000