Based on data compiled by the World Health Organization, the mean systolic blood pressure in the
United States is 120, the standard deviation is 16, and the pressures are normally distributed. Find
The percent of individuals who have blood pressure lower than 104.
A)15.9%
B)19.2%
C)22.7%
D)33.4%

Question

Quizplus · Accepted Answer

To find the percentage of individuals with blood pressure lower than 104, we calculate the z-score: z = (104 - 120) / 16 = -1. Then, using the standard normal distribution table, a z-score of -1 corresponds to approximately 15.9% of the population.

Based on Data Compiled by the World Health Organization, the Mean