Mathematics, 14.03.2020 00:27 christhegreat1

A lot of research is conducted on the sleeping habits of U. S. adults. One study reported that X, the amount of sleep per night of U. S. adults follows a normal distribution with mean μ=7.5 hours and standard deviation σ=1.2 hours.

Using the Standard Deviation Rule, what is the probability that a randomly chosen U. S. adult sleeps more than 8.7 hours per night?

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A lot of research is conducted on the sleeping habits of U. S. adults. One study reported that X, th...