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: 0 / 2 Part 1 of 2 Construct a 90% confidence interval for the mean surgery time for this procedure. X 5 Round the answers to one decimal place. A 95% confidence interval for the mean surgery time for this procedure is Part: 1 / 2 Part 2 of 2 If a 99.9% 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)