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5. For a certain condition, hospital stay is normally distributed with mean 7.2 days and standard deviation 2.1 days. a) A patient has been admitted

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5. For a certain condition, hospital stay is normally distributed with mean 7.2 days and standard deviation 2.1 days. a) A patient has been admitted with this condition. What is the probability that he will stay three days or less\"? b) A patient who stayed 12 days, stayed longer than what percentage of all patients who are admitted with the given condition

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