15 The average age of doctors in a certain hospital is 50 0 years old . Suppose the distribution of ages is normal and has a standard deviation of 60...

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15 The average age of doctors in a certain hospital is 50 0 years old . Suppose the distribution ofages is normal and has a standard deviation of 60 years . If 9 doctors are chosen at randomfor a committee , find the probability that the average age of those doctors is less than 50.6years . Assume that the variable is normally distributedAns : 61 8 %