SOLUTION: The weights of a certain group of high school boys have a normal distribution with a mean of 146 lb and a standard deviation of 10lb. Find the percent of the group having a weight
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Question 1178343: The weights of a certain group of high school boys have a normal distribution with a mean of 146 lb and a standard deviation of 10lb. Find the percent of the group having a weight
(a) greater than 154 lb.
(b) less than 132 lb.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(x-mean)/sd
> 154 is z > (154-146)/10 or z> 0.8. Has probability 0.2119 or 21.2%
-
< 132 is z < (132-146)/10 or -1.4. Has probability of 0.0808 or 8.1%
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