Question

The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 120 and standard deviation of 18 . Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher. a. Around what percentage of adults in the USA have stage 2 high blood pressure

Answer 1

Answer:

The  percentage of adults in the USA have stage 2 high blood pressure=98.679%

Step-by-step explanation:

We are given that

Mean, $\mu=120$

Standard deviation, $\sigma=18$

We have to find percentage of adults in the USA have stage 2 high blood pressure.

$P(x\geq 160)=P(Z\geq \frac{160-120}{18})$

$P(x\geq 160)=P(Z\geq \frac{40}{18})$

$P(x\geq 160)=P(Z\geq 2.22)$

$P(x\geq 160)=1-P(Z\leq 2.22$

$P(x\geq 160)=0.98679$

$P(x\geq 160)=98.679$%

Hence,  the  percentage of adults in the USA have stage 2 high blood pressure=98.679%