Question

Nan Compos-Mentis, a technical consultant, claims that she can increase average hourly productivity for the fabricators at Stryker Manufacturing by more than 10 units per worker. To support her claim, Nan plans to select a sample of workers, provide the workers in the sample with special training, and then use results from the sample in a hypothesis test designed to establish whether the training has had the desired effect. What null and alternative hypotheses would you recommend here?

Answer 1

Answer:

$H_0: \bar X = 10\\H_a: \bar X >10$

Step-by-step explanation:

given that Nan Compos-Mentis, a technical consultant, claims that she can increase average hourly productivity for the fabricators at Stryker Manufacturing by more than 10 units per worker.

To support her claim, Nan plans to select a sample of workers, provide the workers in the sample with special training, and then use results from the sample in a hypothesis test designed to establish whether the training has had the desired effect.

Here her matter of interest is whether training improves the mean score of hourly productivity

Hence the hypotheses should be

$H_0: \bar X = 10\\H_a: \bar X >10$

A right tailed test.