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.
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.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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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.
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