**8/31/2014****
**The
heights of U.S. adult males is approximately Normal with a mean of
69in and a standard deviation of 2.5in. If 1200 U.S. adult males are
randomly selected, how many would be expected to lie exceed
70.5in?**Scroll
down for the solution.**

**8/31/2014
**Solution.
**If
X is a random variable denoting the heights of U.S. adult men in
inches, X ~ N(69, 2.5). We first need P(X > 70.5). Directly using
the graphing calculator, P = NormalCdf(70.5, 9999, 69, 2.5) = 0.2742.
[We could also get the same results by finding the Z-score
corresponding to 70.5in, Z = 0.6 and then use tables. Required, N =
0.2742*1200 = 329.1**