In testing the null hypothesis that the level of heavy equipment usage and the owner’s maintenance policy are independent variables, a mechanical engineer received replies to her questionnaire from a random sample of users. The following summary applies: Equipment Usage By Calendar Maintenance Policy Total By Hours of Operation As Required Light 12 8 13 33 Moderate 7 15 22 44 Heavy 3 22 15 40 Total 22 45 50 117 At the 1% level of significance, should the engineer reject the null hypothesis?

In testing the null hypothesis that the level of heavy equipment usage and the owner’s maintenance policy are independent variables, a mechanical engineer received replies to her questionnaire from a...

In testing the null hypothesis that the level of heavy equipment usage and the owner’s maintenance policy are independent variables, a mechanical engineer received replies to her questionnaire from a random sample of users. The following summary applies:

Equipment Usage	By Calendar	Maintenance Policy	Total
By Hours of Operation As Required
Light	12	8 13	33
Moderate	7	15 22	44
Heavy	3	22 15	40
Total	22	45 50	117

At the 1% level of significance, should the engineer reject the null hypothesis?

May 26, 2022

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In testing the null hypothesis that the level of heavy equipment usage and the owner’s maintenance policy are independent variables, a mechanical engineer received replies to her questionnaire from a...

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