Hi there, I am doing my statistics homework and am having trouble with a few problems. I sincerely appreciate any help I receive! :)
A manufacturer claims that the mean lifetime of its lithium batteries if 1200 hours. A homeowner selects 25 of there batteries and finds the mean lifetime to be 1180 hours with a standard deviation of 80 hours. Test the manufacturers claim. Use (alpha= .05), test the claim
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