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Mathematics, 25.06.2021 01:00 jared3274
State University uses thousands of fluorescent light bulbs each year. The brand of bulb it currently uses has a mean life of 600 hours. A competitor claims that its bulbs, which cost the same as the brand the university currently uses, have a mean life of more than 600 hours. The university has decided to purchase the new brand if, when tested, the evidence supports the manufacturer's claim at the .05 significance level. Suppose 100 bulbs were tested and found to have a mean of 625 hours with a standard deviation of 100. Conduct the test at the .05 level of significance. What is the test statsitic?
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State University uses thousands of fluorescent light bulbs each year. The brand of bulb it currently...
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