Homework Help: stats (please help)

Posted by Celest on Thursday, July 21, 2011 at 8:23pm.

Assume that the population of heights of male college students is approximately normally distributed with mean  of 69 inches and standard deviation  of 3.75 inches. Show all work.
(A) Find the proportion of male college students whose height is greater than 70 inches.
(B) Find the proportion of male college students whose height is no more than 70 inches.

Is this correct?
a) z=(70-69)/3.75 = .2667
.5+.1026 = .6026
b) 1-.6026 = .374 or 37.4%

any help is appreciated

stats (please help) - drwls, Friday, July 22, 2011 at 12:50am
Your z is correct, but I get 39.5% for (A) and 60.5% for (B)

Clearly there are less than 50% with heights of 70 inches and above if 69 is the mean.

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