Question

if the mean bp is 110 and the standard deviation is 15 where would 95% of population be

Answer 1

http://davidmlane.com/hyperstat/z_table.html

Try in the region of 135

Answer 2

Also you can find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion indicated. Insert Z score value in the formula below and solve for the score.

Z = (score-mean)/SD = (score-110)/15

This method does not require a computer or electricity.