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Show transcribed image text The healing time for a certain type of incision is normally distributed with a mean of 240 hours and a standard deviation of 20 hours. a. What is the probability that the healing time for a randomly selected patient will exceed 255 hours? (4 marks) PC b. What is the probability that the healing time for a randomly selected patient (1 ma will be exactly 240 hours? c. Ninety percent of persons with this type of incision will require less than what amou time to heal?
The healing time for a certain type of incision is normally distributed with a mean of 240 hours and a standard deviation of 20 hours. a. What is the probability that the healing time for a randomly selected patient will exceed 255 hours? (4 marks) PC b. What is the probability that the healing time for a randomly selected patient (1 ma will be exactly 240 hours? c. Ninety percent of persons with this type of incision will require less than what amou time to heal?
