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The life of light bulbs is distributed normally. The standard deviation of the lifetime is 25 hours and the mean lifetime of a bulb is 530 hours....

I'm needing help on solving this question using the Z chartsScreen Shot 2019-05-02 at 3.10.23 PM.png

Screen Shot 2019-05-02 at 3.10.23 PM.png

The life of light bulbs is distributed normally. The standard deviation of the lifetime is 25 hours and the mean lifetime of a bulb is 530
hours. Find the probability of a bulb lasting for at most 572 hours. Round your answer to four decimal places.

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P(X<=572)=P... View the full answer

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