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A manufacturer of electric lamps is testing a new production method that will be considered acceptable...

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Basic Math

A manufacturer of electric lamps is testing a new productionmethod that will be considered acceptable if the lamps produced bythis method result in a normal population with an average life of2,400 hours and a standard deviation equal to 300. A sample of 100lamps produced by this method has an average life of 2,320 hours.Can the hypothesis of validity for the new manufacturing process beaccepted with a risk equal to or less than 5%?

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