Hip surgery: In a sample of 118 hip surgeries of a certain type, the average surgery time was 135.9 minutes with a standard deviation of 22.1 minutes. Part: 0 / 2 Part 1 of 2 (a) Construct a 99% confidence interval for the mean surgery time for this procedure. Round the answers to at least one decimal place. A 99 % confidence interval for the mean surgery time for this procedure is Part: 1 / 2 Part 2 of 2 (b) If a 99.5 % 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 X (a). 5 narrower wider