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For the normal distribution of burning times of electric light bulbs, with a mean equal to 1200 hours and a standard deviation equal to 120
- For the normal distribution of burning times of electric light bulbs, with a mean equal to 1200 hours and a standard deviation equal to 120 hours, what burning time is identified with the a. upper 50 percent? b. lower 75 percent? c. lower 1 percent? d. middle 90 percent?
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Authors: Robert S. Witte, John S. Witte
10th Edition
9781118805350, 1118450531, 1118805356, 978-1118450536
