Question
IF The lifetimes of light bulbs of a particular type are normally distributed with a mean of 270 hours and a standard deviation of 11
IF The lifetimes of light bulbs of a particular type are normally distributed with a mean of 270 hours and a standard deviation of 11 hours. What percentage of the bulbs have lifetimes that lie within 2 standard deviations of the mean on either side?
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Complex Analysis
Authors: Dennis G Zill, Patrick D Shanahan
3rd Edition
1449694624, 9781449694623
