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Author Question: A manufacturer claims that the mean lifetime of its lithium batteries is 1200 hours. A homeowner ... (Read 19 times)

colton

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A manufacturer claims that the mean lifetime of its lithium batteries is 1200 hours. A homeowner selects 25 of these batteries and finds the mean lifetime to be 1180 hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use α = 0.05. Round the test statistic to the nearest thousandth.


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Marked as best answer by colton on Jan 16, 2020

ergserg

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colton

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Reply 2 on: Jan 16, 2020
Excellent


6ana001

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Reply 3 on: Yesterday
:D TYSM

 

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