The mean gross annual incomes of certified welders are normally distributed with the mean of $20,000 and a standard deviation of $2,000.The ship building association wishes to find out whether their welders earn more or less than $20,000 annually.The alternate hypothesis is that the mean is not $20,000.Which of the following is the alternate hypothesis?
A) $\pi$ $\neq$ $20,000
B)µ$\neq$$20,000
C)µ

Question

The mean gross annual incomes of certified welders are normally distributed with the mean of $20,000 and a standard deviation of $2,000.The ship building association wishes to find out whether their welders earn more or less than $20,000 annually.The alternate hypothesis is that the mean is not $20,000.Which of the following is the alternate hypothesis?
A) $\pi$ $\neq$ $20,000
B)µ$\neq$$20,000
C)µ < $20,000
D)µ = $20,000
E) $\pi$ = $20,000

Quizplus · Accepted Answer

The alternate hypothesis is the opposite of the null hypothesis, which in this case is that the mean is $20,000. Therefore, the alternate hypothesis would be that the mean is not $20,000, or µ≠$20,000. Choice B matches this description.

The Mean Gross Annual Incomes of Certified Welders Are Normally π\piπ

The Mean Gross Annual Incomes of Certified Welders Are Normally $\pi$