Homework SourseAt a001 would you buy model A assume samples are randomly se
At a=0.01 would you buy model A? assume samples are randomly selected and that samples are independent
Solution
Model A repair costs are lower than model B.
H0: muA= muB
Ha: mua < muB
As p > alpha, accept null hypothesis.
Model A repair not lower than B.
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Option A.
Fail to reject H0. It is not in rejection region
| z-value | 1.1025 |
| one-tailed p-value | 0.8649 |
| 99% confidence internvals | |
| upper | 15.5504 |
| lower | -Inf |
