Construct a 95% confidence interval for the population mean, . Assume the population has a normal distribution. A sample of 20 part-time workers had mean annual earnings of $3120 with a standard deviation of $677. Round to the nearest dollar.
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Step 1
We have a sample size (n) of 20 part-time workers, a sample mean (\(\bar{x}\)) of $3120, and a sample standard deviation (s) of $677. We are asked to construct a 95% confidence interval for the population mean. Show more…
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