< Prev A hospital would like to determine the mean length of stay for its patients having abdominal surgery. A sample of 24 patients revealed a sample mean of 6.2 days and a sample standard deviation of 1.4 days. Assume that the lengths of stay are approximately normally distributed. Find a 90% confidence interval for the mean length of stay for patients with abdominal surgery. Round the endpoints to two decimal places, if necessary. Answer 2 Points Lower Endpoint Upper Endpoint Tables Keypad Keyboard Shortcuts M