If a light bulb manufacturing company wants to estimate, with 95% confidence, the mean life of compact
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If a light bulb manufacturing company wants to estimate, with 95% confidence, the mean life of compact fluorescent light bulbs to within ± 200 hours and also assumes that the population standard deviation is 1,000 hours, how many compact fluorescent light bulbs need to be selected?
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Related Book For 
Business Statistics A First Course
ISBN: 9780321979018
7th Edition
Authors: David M. Levine, Kathryn A. Szabat, David F. Stephan
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