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Question 7 Suppose that a brand of lightbulb lasts on average 2091 hours with a standard deviation of 103 hours. Assume the life of the

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Question 7 Suppose that a brand of lightbulb lasts on average 2091 hours with a standard deviation of 103 hours. Assume the life of the lightbulb is normally distributed. Calculate the probability that a particular bulb will last from 1814 to 2313 hours? P(1814

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