Lifetimes of batteries are normally distributed with mean 55 hours and standard deviation 4 hours. Find the probability that a randomly chosen battery lasts longer than 52 hours.
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We are given that X is normally distributed with mean $\mu = 55$ hours and standard deviation $\sigma = 4$ hours. We want to find the probability that a randomly chosen battery lasts longer than 52 hours, i.e., $P(X > 52)$. Show more…
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