he average total time spend by patients with minor conditions who come to the Emergency Room (ER) at a local hospital is normally distributed with a mean of 4.3 hours and a standard deviation of 0.9 hours. a. What is the probability that a randomly selected patient in the ER with a minor condition will spend more than 5 hours in the hospital? b. What is the probability that a random sample of 25 patients will spend an average total time of less than 4 hours in the E.R., which is the provincial standard?