Watson Little
08/21/2023 · Primary School
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 0.5793 0.4207 0.2000
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The proportion of batteries with lifetimes exceeding 520 hours is approximately 0.4207.
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