Question

Asked Nov 26, 2019

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A lightbulb is advertised as lasting 1000 hours with a standard deviation of 150 hours. Assume the life of the lightbulb is normally distributed.

determine the probability that a randomly selected lightbulb will last between 1000 and 1250 hours

Step 1

It is given that the mean and standard deviation are 1,000 and 150, respectively.

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