A dusk-to-dawn outdoor light bulb has an expected (mean) life of 8,000 hours with a standard deviation
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7500 hours is 500 hours below the mean 8000 7500 500 hours 500 hours is 2 s...View the full answer
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Related Book For
Business Math
ISBN: 978-0133011203
10th edition
Authors: Cheryl Cleaves, Margie Hobbs, Jeffrey Noble
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