Question: 10. For a random sample,X 83 and n 625; assume 15. (a) Test H0: 80 against H1: 80 05 . What does

10. For a random sample,X 83 and n 625; assume σ 15.

(a) Test H0: μ 80 against H1: 80 α 05 . What does this tell you about μ?

(b) Construct the 95% confidence interval for μ. What does this tell you about μ?

(c) Which approach gives you more information about μ? (Explain.)

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