SOLUTION: Mr. Butts smoked 15 cigarettes per day. Whats the probability a smoker will smoke less than Mr. Butts. mean = 11. standard deviation = 5

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 Click here to see ALL problems on Probability-and-statistics Question 367316: Mr. Butts smoked 15 cigarettes per day. Whats the probability a smoker will smoke less than Mr. Butts. mean = 11. standard deviation = 5Answer by stanbon(57387)   (Show Source): You can put this solution on YOUR website! Mr. Butts smoked 15 cigarettes per day. Whats the probability a smoker will smoke less than Mr. Butts. mean = 11. standard deviation = 5 ------------------------------------------- z(15) = (15-11)/5 = 0.8 ----- P(x<15) = P(z<0.8) = 0.7881 ============== Cheers, Stan H.