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Suppose the length a cat takes a nap (the length of a cat nap) has a population mean of 3 hours, with population standard deviation

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Suppose the length a cat takes a nap (the length of a cat nap) has a population mean of 3 hours, with population standard deviation 1.75 hours. Assume the length of a cat nap is normally distributed. (a) Find the probability that a randomly selected cat takes a nap over 4 hours in length.

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