Question 609791
Assume that the population of heights of male college students is approximately normally distributed with mean m of 70 inches and standard deviation s of 4.15 inches. Show all work. 
(A) Find the proportion of male college students whose height is greater than 68 inches.
z(68) = (68-70)/4.15 = -0.4819
P(x > 68) = P(z > -0.4819) = 0.6851
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(B) Find the proportion of male college students whose height is no more than 68 inches.
Ams: 1 - 0.6851 = 0.3159
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I have my work, but I want to make sure I am doing it right. We are using z score tables to determine the area(probability) based on the information given. The only thing I am really uncertain of is the on B where it is not just less than, but also = to 68 in.
Comment: The end values make no difference.
Example: P(x > 68) is the same as P(x >= 68)
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Cheers,
Stan H.
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