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OpenStudy (anonymous):
The life expectancy of a typical lightbulb is normally distributed with a mean of 2,100 hours and a standard deviation of 40 hours. What is the probability that a lightbulb will last between 1,965 and 2,165 hours?
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OpenStudy (anonymous):
0.8835 0.9820 0.9233 0.9480
OpenStudy (anonymous):
@zepdrix
OpenStudy (anonymous):
@RadEn @Skyz @AlbaRyder
OpenStudy (anonymous):
@Hero
OpenStudy (anonymous):
I'm not too sure but i think it's 0.9233
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