Posted by Felicia on Wednesday, May 19, 2010 at 7:03pm.
The mean systolic blood pressure of adult males is normally
distributed with a mean of 138 (millimeters of
mercury) and a standard deviation of 9.7. What percent
of adult males have blood pressure between 161.28 and
164.9?

Math/ Probability  PsyDAG, Thursday, May 20, 2010 at 11:56pm
Z = (scoremean)/SD
Calculate the two z scores. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion between these two Z scores.