Asked by angela

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, approximately what percentage of light bulbs has a life of more than 3000 hours?
A. About 84%
B. About 68%
C. About 32%
D. About 16%

Answer B
Answered by Reiny
I got .1587, which matches 16% or D

Did you take 1 - ...., since it asked for "above" ?
Answered by PsyDAG
Disagree. "More than" includes everything below the mean.
Answered by PsyDAG
Agree.
Answered by angela
PsyDag do you agree with Reiny or the answer i have
Answered by PsyDAG
I misread the Question, so your answer
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