The Mean Gross Annual Incomes of Certified Tack Welders Are $\neq$

Multiple Choice

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 $\neq$ $50,000
B) $\mu$ $\neq$ $50,000
C) $\mu$ < $50,000
D) $\mu$ = $50,000
E) p = $50,000