Question
The mean life of a particular brand of light bulb is 1200 hours. If you know that at about 95% of this brand of bulbs
The mean life of a particular brand of light bulb is 1200 hours. If you know that at about 95% of this brand of bulbs will last between 1100 and 1300 hours, then what is the standard deviation of the light bulbs life?
a. 25
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b.50
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c.200
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d.100
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e. 75
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Linear Algebra and Its Applications
Authors: David C. Lay
4th edition
321791541, 978-0321388834, 978-0321791542
