10 For a random sample,X 83 and n 625 assume 15 (a) Test H0 80 against H1 80 05 What does this tell you about (b) Construct the 95 confidence interval for What does this tell you about (c) Which approach gives you more information about (Explain ) ...

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10. For a random sample,X 83 and n 625; assume 15. (a) Test H0: 80...

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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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