A quality control engineer is interested in testing the mean life of a new brand of light
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A quality control engineer is interested in testing the mean life of a new brand of light bulbs. A sample of 100 light bulbs is taken, and the sample mean life of these light bulbs is found to be 1,075 h. Suppose the standard deviation is known and is 100 h. Use a .05 level of significance to test the hypothesis that the mean life of the new bulbs is greater than 1,000 h.
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BHUMIN SUTHAR
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Related Book For 
Statistics For Business And Financial Economics
ISBN: 9781461458975
3rd Edition
Authors: Cheng Few Lee , John C Lee , Alice C Lee
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