Posted by Josh on Tuesday, December 13, 2011 at 10:49pm.
9. Assume the weight, W, of a randomly selected adult has a normal distribution with a mean
of 175 pounds and a standard deviation of 10 pounds.. Find the probability, P(W < 190), that
a randomly selected adult weighs less than 190 pounds.

Statistics  bobpursley, Tuesday, December 13, 2011 at 11:39pm
http://davidmlane.com/hyperstat/z_table.html

Statistics  PsyDAG, Wednesday, December 14, 2011 at 10:27am
Another method.
Z = (scoremean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.
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