The systolic blood pressure of 18-year-old women is normally distributed with a mean of 120 mm Hg and a standard deviation of 12 mm Hg. What percentage of 18-year-old women have a systolic blood pressure that is within 3 standard deviations of the mean on either side?

Question

Apply the 68-95-99.7 rule to this question.

A. 68%
B. 95%
C. 100%
D. 99.7%

Answer :D

Answer 1

I used the actual normal distribution and got
.9973

http://davidmlane.com/normal.html

Answer 2

I used the actual normal distribution and got
.9973

http://davidmlane.com/normal.html

Answer 3

Thanks