With a known population mean of 1500, and a known standard error of the mean of 42.50, what is the probability of selecting at random a sample whose mean is 1450 or less?

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The Answer of With a known population mean of 1500, and a known standard error of the mean of 42.50, what is the probability of selecting at random a sample whose mean is 1450 or less?

With a Known Population Mean of 1500, and a Known