Mathematics, 20.07.2021 03:40 chris018107
A researcher records the repair cost for 27 randomly selected refrigerators. A sample mean of $60.52 and standard deviation of $23.29 are subsequently computed. Determine the 90% confidence interval for the mean repair cost for the refrigerators. 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 researcher records the repair cost for 27 randomly selected refrigerators. A sample mean of $60.52...
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