Asked by Saralynn Niealsen

Assume the lifespan of light bulbs manufactured by Bright Inc. can be modeled with a normal distribution with a mean of 300 days and a standard deviation of 40 days. 70% of light bulbs produced by Bright Inc. survive longer than how many days?

9 years ago

Answered by Damon

http://davidmlane.com/hyperstat/z_table.html

9 years ago

Answered by Anonymous

302.o

8 years ago

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Asked by Saralynn Niealsen

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