Repeat Exercise 38, changing the sample size to n = 40. Which confidence interval is wider? Explain.

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Exercise 38

In a random sample of 60 refrigerators, the mean repair cost was $150.00. Assume the population standard deviation is $15.50. Construct a 99% confidence interval for the population mean repair cost. Interpret the results.

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Elementary Statistics Picturing The World

ISBN: 9780321911216

6th Edition

Authors: Ron Larson, Betsy Farber

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Question Posted: Nov 24, 2015 07:48 AM

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Repeat Exercise 38, changing the sample size to n = 40. Which confidence interval is wider? Explain.

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x z c n 150 2575 155 40 150 63...View the full answer

Elementary Statistics Picturing The World

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