Hip surgery: In a sample of 124 hip surgeries of a certain type, the average surgery time was 137.1 minutes, with a standard deviation of 22.7 minutes. Part: 0/2 Part 1 of 2 Construct a 99.9% confidence interval for the mean surgery time for this procedure. Round the answers to one decimal place. A 99.9% confidence interval for the mean surgery time for this procedure is <μ< Part: 1 / 2 Part 2 of 2 If a 98% confidence interval were constructed with these data, would it be wider or narrower than the interval constructed in part (a)? Explain. The new confidence interval would be (Choose one) than the interval constructed in part (a). X X

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