The mean and standard deviation of a random sample of n measurements are equal to 33.5 and

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The mean and standard deviation of a random sample of n measurements are equal to 33.5 and 3.5, respectively.

a. Find a 90% confidence interval for m if n = 144.

b. Find a 90% confidence interval for m if n = 576.

c. Find the widths of the confidence intervals found in parts a and

b. What is the effect on the width of a confidence interval of quadrupling the sample size while holding the confidence coefficient fixed?

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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 07:02 PM

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The mean and standard deviation of a random sample of n measurements are equal to 33.5 and

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Statistics Plus New Mylab Statistics With Pearson Etext Access Card Package

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