It is known that the lifetime of a lightbulb is normally

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A) It is known that the annual snowfall totals in Maine are normally distributed with a mean of 80.3 inches and a standard deviation of 23.7 inches. What is the probability that Maine gets more than 120 inches (10feet) of snow in a randomly select year?

B) It is known that the lifetime of a lightbulb is normally distributed with a mean lifetime of 1,060 hrs and a standard deviation of 125 hrs. What is the probability that a randomly selected light bulb will last between 1,000 and 1,100 hrs?

Reference no: EM13637369

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