Mathematics, 31.10.2019 07:31, hannahg9525

The following histogram displays the distribution of battery life (in hours) for a certain battery model used in cell phones: 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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The following histogram displays the distribution of battery life (in hours) for a certain battery m...