SOLUTION: The number of column inches of classified advertisements appearing on Mondays in a certain daily newspaper is normally distributed with a population mean of 320 and a population s
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Question 1082108: The number of column inches of classified advertisements appearing on Mondays in a certain daily newspaper is normally distributed with a population mean of 320 and a population standard deviation of 20 inches. For a randomly chosen Monday, what is the probability that there will be between 280 and 360 column inches of classified advertisement? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! The z value is (x-mean)/sd
therefore (280-320)/20=-2 and (360-320)/20=+2
the probability between -2 and +2 is 0.9544.
