9. A supervisor claim that the team in his engineering team on average work more over 60 hours per week. A sample of 150 has the mean of 64.6 hours with a standard deviation of 8.93 hours a. State the...

Extracted text: 9. A supervisor claim that the team in his engineering team on average work more over 60 hours per week. A sample of 150 has the mean of 64.6 hours with a standard deviation of 8.93 hours a. State the null and alternative hypothesis including the claim. b. Testthe hypothesis use 0.05 of significance level.