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# A manufacturer claims that the mean lifetime of its fluorescentbulbs is 1300 hours. A homeowner selects 25 bulbs and finds themean lifetime to be 1270 hours with a ...

## Question

###### A manufacturer claims that the mean lifetime of its fluorescentbulbs is 1300 hours. A homeowner selects 25 bulbs and finds themean lifetime to be 1270 hours with a standard deviation of 80hours. Test the manufacturerÊ¹s claim. Use Î± = 0.05. Identify theclaim, state the null and alternative hypotheses, find the criticalvalue, find the standardized test statistic, make a decision on thenull hypothesis (you may use a P-Value instead of the standardizedtest statistic), write an interpretation state

A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1300 hours. A homeowner selects 25 bulbs and finds the mean lifetime to be 1270 hours with a standard deviation of 80 hours. Test the manufacturerÊ¹s claim. Use Î± = 0.05. Identify the claim, state the null and alternative hypotheses, find the critical value, find the standardized test statistic, make a decision on the null hypothesis (you may use a P-Value instead of the standardized test statistic), write an interpretation statement on the decision.

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