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Suppose X has a normal distribution with mean -0.72 and standard deviation J3 . The pnorm(), dnorm() and qnorm() functions should be useful in the

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Suppose X has a normal distribution with mean -0.72 and standard deviation J3 . The pnorm(), dnorm() and qnorm() functions should be useful in the following. a) What is the expected value of 3X + 5? b) What is the variance of 3X + 5? c) Calculate the probability X > 0 d) Calculate the probability that X t = .241 then what is t

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