Use the empirical rule to solve the problem.
-The systolic blood pressure of 18-year-old women is normally distributed with a mean of 120 mmHg and a standard deviation of 12 mmHg. What percentage of 18-year-old women have a
Systolic blood pressure that lies within 3 standard deviations to either side of the mean?
A)68.26%
B)99.99%
C)95.44%
D)99.74%

Question

Use the empirical rule to solve the problem.
-The systolic blood pressure of 18-year-old women is normally distributed with a mean of 120 mmHg and a standard deviation of 12 mmHg. What percentage of 18-year-old women have a
Systolic blood pressure that lies within 3 standard deviations to either side of the mean? 
A)68.26%
B)99.99%
C)95.44%
D)99.74%

Quizplus · Accepted Answer

The empirical rule states that for a normal distribution, approximately 68% of the data falls within one standard deviation of the mean, 95% within two standard deviations, and 99.7% (or 99.74% rounded) within three standard deviations.

Use the Empirical Rule to Solve the Problem