SOLUTION: The weights of books on a library shelf are normally distributed with a mean of 3.1 pounds and a standard deviation of 0.8 pound. Approximately what percent of the books weigh more
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-> SOLUTION: The weights of books on a library shelf are normally distributed with a mean of 3.1 pounds and a standard deviation of 0.8 pound. Approximately what percent of the books weigh more
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Question 971268: The weights of books on a library shelf are normally distributed with a mean of 3.1 pounds and a standard deviation of 0.8 pound. Approximately what percent of the books weigh more than 3.5 pounds? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z=(3.5-3.1)/0.8 ; difference between value and mean divided by standard deviation
z>0.4/0.8
z>0.5
P=0.3085
30.85% or 31%.
