Mathematics, 19.09.2019 11:20 ayoismeisalex
The lifetimes of lightbulbs of a particular type are normally distributed with a mean of 392 hours and a standard deviation of 9 hours. find the first quartile, q1.
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Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.
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The lifetimes of lightbulbs of a particular type are normally distributed with a mean of 392 hours a...
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