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Mathematics, 27.12.2019 00:31 kamayabrown668
The manufacturer of an extended-life lightbulb claims the bulb has an average life of 12,000 hours, with a standard deviation of 500 hours. if the distribution is bell shaped and symmetrical, what is the approximate percentage of these bulbs that will last between 11,000 and 13,000 hours?
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The manufacturer of an extended-life lightbulb claims the bulb has an average life of 12,000 hours,...
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