Mathematics, 20.04.2021 18:20 isabelperez063
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A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1000 hours. A homeowner suspects that it is less than that. She selects 40 bulbs and finds the mean lifetime to be 980 hours with a standard deviation of 80 hours. If α = 0.01, test the manufacturer's claim using P-values.
Define
Hypotheses
Justify
Test statistic
Pvalue
Conclusion
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