Mathematics, 10.03.2020 00:07 kcain1020
A consumer affairs investigator records the repair cost for 4 randomly selected washers. A sample mean of $64.26 and standard deviation of $27.77 are subsequently computed. Determine the 80% confidence interval for the mean repair cost for the washers. Assume the population is approximately normal. Step 1 of 2 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
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A consumer affairs investigator records the repair cost for 4 randomly selected washers. A sample me...
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