A manufacturer claims that the mean lifetime of its lithium batteries is 1500 hours. A homeowner selects 25 of these batteries and finds the mean lifetime to be 1470 hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use a = 0.05. Round the test statistic to the nearest thousandth.

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A manufacturer claims that the mean lifetime of its lithium batteries is 1500 hours.
A homeowner selects 25 of these batteries and finds the mean lifetime to be 1470
hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use a =
0.05. Round the test statistic to the nearest thousandth.
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Transcribed Image Text:A manufacturer claims that the mean lifetime of its lithium batteries is 1500 hours. A homeowner selects 25 of these batteries and finds the mean lifetime to be 1470 hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use a = 0.05. Round the test statistic to the nearest thousandth. HTML Editor BIUA T EE E 1 E x' x,三 三 12pt Paraç 回 深 回 ONDSMVS
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