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The life expectancy of a lightbulb is normally distributed with a mean of 1975 hours and a standard deviation of 25 hours what is the probability that a lightbulb last between 1 950 and 2050 hours
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Feb 22, 2017
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The life expectancy of a lightbulb is normally distributed with a mean of 1975 hours and a standard deviation of 25 hours what is the probability that a lightbulb last between 1 950 and 2050 hours
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Robert Pankowecki
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(1975-1950)/25 = 25/25 = +1
Jzadeh
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Feb 28, 2017
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