For Exercises 7–10, perform the indicated Welch's hypothesis test using the -value method. The summary statistics were taken from random samples that were drawn independently. For each exercise follow these steps:
9. Test, at level of significance , whether .
Sample 1 | |||
Sample 2 |
10.2.9
(a) . Reject if the ≤ 0.05.
(b) . (c) . (d) Since the is ≤ 0.05, we reject . There is evidence at the level of significance that the population mean of Population 1 is less than the population mean of Population 2.