SAT, 26.11.2021 21:50, ayoismeisalex

A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1500 hours. A homeowner selects 40 bulbs and finds the mean lifetime to be 1480 hours with a population standard deviation of 80 hours. Test the manufacturer’s claim. Use alpha equal to 0. 5.

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A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1500 hours. A homeowner sel...

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