The lifetime of a 2-volt non-rechargeable battery in constant use has a Normal distribution, with a mean of 516 hours and a standard deviation of 20 hours. The proportion of batteries with lifetimes exceeding 520 hours is approximately 0.4207 0.2000 0.5793
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- Mean (\(\mu\)) = 516 hours - Standard deviation (\(\sigma\)) = 20 hours - We want to find the proportion of batteries with lifetimes exceeding 520 hours. Show more…
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