at is the standard deviation of distribution of X? What is the standard deviation of X? For a single randomly selected graduate, find the probability that her salary is between $130,075 and 139,350. For a simple random sample of 16 graduates, find the probability that the average salary is between 130,075 and $139,350. For part d), is the assumption of normal necessary? O NoO Yes Submit Question

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Q: question number 2

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