10 May A Company Has A Device That Purports To Increase The Life Of Lightbulbs …
A company has a device that purports to increase the life of lightbulbs. To test this claim, you purchase a sample of 10 lightbulbs that have an advertised life of 2000 hours and see how long they last with the use of the device. You obtain the values below. Bulb Life alpha = .05 test to see if the device works as claimed
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