A random sample of 20 observations selected from a normal population produced x = 82.6 and s2

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= 29.4.

a. Form a 95% confidence interval for m.

b. Test H0: m = 90 against Ha: m 6 90. Use a = .05.

c. Test H0: m = 90 against Ha: m 90. Use a = .01.

d. Form a 90% confidence interval for m.

e. How large a sample would be required to estimate m to within 1 unit with 99% confidence?

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Statistics Plus New Mylab Statistics With Pearson Etext Access Card Package

ISBN: 978-0134090436

13th Edition

Authors: James Mcclave ,Terry Sincich

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Question Posted: Jul 19, 2024 06:05 PM

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A random sample of 20 observations selected from a normal population produced x = 82.6 and s2

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Statistics Plus New Mylab Statistics With Pearson Etext Access Card Package

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