The lifetimes of light bulbs of a particular type are
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
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suppose you analyzed the average monthly credit card bill of visa credit card customers using two randomly selected
the lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard
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