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Probability that the hours of sleep per night

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A survey indicated that the total hours of sleep time per night, denoted by the random variable X, can be approximated by a normal model with E(X) = 6.84 hours and SD(X) = 1.12 hours.

What would be the probability that the hours of sleep per night for a random sample of 4 college students has a mean between 6.73 and 6.92?

Reference no: EM132040871

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