The weights of 1,000 men in a certain town follow a normal distribution with a mean of 150 pounds and a standard deviation of 15 pounds.
from the data, we can conclude that the number of men weighing more than 165 pounds is about , and the number of men weighing less than 135 pounds is about .

z = ( 135 - μ ) / σ = -1  

z = ( 165 - μ ) / σ = 1  

P (x < 135) = P (z < -1) = 0.1587  

P (165 < x) = P (1 < z) = 0.1587  

.187 * 1000 = 187 more than 165  

.187 * 1000 = 187 less than 135

1000 / 187 =5.34

5.34%

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