Mathematics, 23.11.2021 23:10 la200564
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is 750 hours. A random sample of 36 light bulbs has a mean life of 745 hours with a standard deviation of 60 hours. At α = 0.02 α=0.02, test the manufacturer's claim.
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A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is 750 hours...
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