A simple random sample of 50 items from a population with sigma = 6 resulted in a sample mean of 32.(a) Provide a 90% confidence interval for the population mean(b) Provide a 95% confidence interval for the population mean(c) Provide a 99% confidence interval for the population mean
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The Z-score for a 90% confidence interval is 1.645, for a 95% confidence interval is 1.96, and for a 99% confidence interval is 2.576. (a) For a 90% confidence interval, we substitute the values into the formula: 32 ± (1.645 * (6 / √50)) = 32 ± 1.40 = [30.60, Show more…
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