Mathematics, 08.07.2019 16:50 eskarletche8

Suppose that battery life is a normal random variable with μ = 8 and σ = 1.2. using the standard deviation rule, what is the probability that a randomly chosen battery will last between 6.8 and 9.2 hours?

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Suppose that battery life is a normal random variable with μ = 8 and σ = 1.2. using the standard dev...