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A sample of 25 is selected from a population of 500 items. The sample mean is 25.7, and the sample standard deviation is 7.8. Construct a 99% confidence interval estimate for the population total. 8.51 Suppose that a sample of 200 (stored in ) is selected from a population of 10,000 items. Of these, 10 items are found to have the following errors: 13.76 42.87 34.65 11.09 14.54 22.87 25.52 9.81 10.03 15.49 Construct a 95% confidence interval estimate for the total difference in the population
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