10.4

1.

  1. 28.869

  2. 14.041

  3. (16.047, 45.722)

3.

  1. 20.496

  2. 13.091

  3. Skip but feel free to sketch on a piece of paper for your benefit.

  4. No, because the test statistic is greater than the critical value

13. Feel free to use any method you want. If you use the classical method please report the value of your test statistic and your decision. Likewise if you use the pvalue method please state your pvalue and your decision. Hint: The sample standard deviation (s) is 15.20.

Test Statistic = 6.422 Critical Value = 3.325

Can’t reject the null hypothesis

15. Feel free to use any method you want. If you use the classical method please report the value of the test statistic and your decision. Likewise if you use the pvalue method please state your pvalue and your decision.

Test Statistic = 15.639 Critical Value = 15.659

Can’t reject the null hypothesis.