The mean gross annual incomes of the population of certified tack welders are normally distributed with the mean
The mean gross annual incomes of the population of certified tack welders are normally distributed with the mean
of $20,000 and a standard deviation of $5,000. ;The ship building association wishes to find out whether their tack welders earn $20,000 annually or not. ;A sample of 81 ship building tack welders revealed a sample mean of $21,111. ;What is the result of the test?
z = 2, Reject the null hypothesis, the ship building tack welders do not earn $21,111.
z = 2, Accept the null hypothesis, the ship building tack welders do earn $20,000.
Need assignment help for this question?
If you need assistance with writing your essay, we are ready to help you!
OUR PROCESS
Order
Payment
Writing
Delivery
Why Choose Us: Cost-efficiency, Plagiarism free, Money Back Guarantee, On-time Delivery, Total Сonfidentiality, 24/7 Support, 100% originality
z = 2, Reject the null hypothesis, the ship building tack welders do not earn $20,000. They earn less.
z = 2, Reject the null hypothesis, the ship building tack welders do earn $20,000. They earn more.
z = 2, Reject the null hypothesis, the ship building tack welders do not earn $20,000. They earn more.
z = 2, Fail to reject the null hypothesis, the ship building tack welders do not earn $20,000. They earn more.
The paired t-test is used for what type of samples?
30 or more
large
multiple groups
independent
dependent
nominal data
To compare a sample to a sample when n < 30, which distribution should be used?
decision rule
the z distribution
the t distribution
the F distribution
the chi-square distribution
the alpha distribution
p-value distribution
To compare a sample to a sample when n ≥ 30, which distribution should be used?
decision rule
the z distribution
the t distribution
the F distribution
the chi-square distribution
the alpha distribution
p-value distribution
What is another name for the alternate hypothesis?
null hypothesis
alternate hypothesis
research hypothesis
decision rule
critical hypothesis