Hip surgery: In a sample of 121 hip surgeries of a certain type, the average surgery time was 136.5 minutes with a standard deviation of 22.4 minutes. (a) Construct a 90% condence interval for the mean surgery time for this procedure. Round the answers to at least one decimal place. A 90% condence Interval for the mean surgery time for this procedure ls D Question 1 of 4 (1 point) | Attempt 1 of Unlimited | View question in a popup 7.2 Section Exercise 17 - 20 (cal A sample of size n = 43 has sample mean x = 53.6 and sample standard deviation s = 9.1. Part: 0 / 2 EC Part 1 of 2 Construct a 90% confidence interval for the population mean u. Round the answers to one decimal place. A 90% confidence interval for the population mean is