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Mathematics, 28.07.2020 04:01 scottbrandon653

In a random sample of 40 refrigerators, the mean repair cost was $150. Assume the population standard deviation is $15.50. Construct a 99% confidence interval for the population mean repair cost. Then change the sample size to n = 60. Which confidence interval has the better estimate?

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In a random sample of 40 refrigerators, the mean repair cost was $150. Assume the population standar...
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