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14-11-2022
Mathematics

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A light bulb manufacturer claims that a certain type of bulb they make has a mean lifetime of 100010001000 hours and a standard deviation of 202020 hours. Each package sold contains 444 of these bulbs. Suppose that each package represents an SRS of bulbs, and we calculate the sample mean lifetime \bar x
x
ˉ
x, with, \bar, on top of the bulbs in each package.

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