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help answering these questions . Assume that assume that X has a normal distribution with the specified mean and standard deviation 1 convert X intervals

help answering these questions .

Assume that assume that X has a normal distribution with the specified mean and standard deviation 1 convert X intervals to Z intervals. 2 find the indicated probability using the standard normal distribution table.

P(x <71);u=40;stand a Rd deviation =15

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