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Hip surgery: In a sample of 127 hip surgeries of a certain type, the average surgery time was 137.7 minutes with a standard deviation of

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Hip surgery: In a sample of 127 hip surgeries of a certain type, the average surgery time was 137.7 minutes with a standard deviation of 23.1 minutes. Part 1 of 2 (a) Construct a 95% confidence interval for the mean surgery time for this procedure. Round your answers to one decimal place. A 95% confidence interval for the mean surgery time for this procedure is

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