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OpenStudy (anonymous):
Check my answer please! 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? 0.8835 0.9820 0.9233 <--- My answer 0.9480
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OpenStudy (anonymous):
@hartnn
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