SOLUTION: The lifetimes of 20,000 light bulbs are normally distributed. The mean lifetime is 230 days. The standard deviation is 40 days. Find the values defined by the standard deviation in
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Question 973213: The lifetimes of 20,000 light bulbs are normally distributed. The mean lifetime is 230 days. The standard deviation is 40 days. Find the values defined by the standard deviation in a normal distribution for 3 standard deviations. Answer by oscargut(2103) (Show Source):
You can put this solution on YOUR website! 230 + 3(sd) = 230+3(40) = 350
230 - 3(sd) = 230-3(40) = 110
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