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

question 28

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

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