Question: 10. For a random sample, X 83 and n 625; assume s 15. (a) Test H0: m 80 against H1: 6
10. For a random sample, X ¼ 83 and n ¼ 625; assume s ¼ 15.
(a) Test H0: m ¼ 80 against H1: 6¼ 80 ða ¼ :05Þ. What does this tell you about m?
(b) Construct the 95% confidence interval for m. What does this tell you about m?
(c) Which approach gives you more information about m? (Explain.)
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