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The systolic blood pressure of adults in the USA is nearly normally distributed with a mean...

The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 122 and a standard deviation of 19.

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? Give your answer rounded to two decimal places.

____%

(b) Stage 1 high BP is specified as systolic BP between 140 and 160. What percentage of adults in the US qualify for stage 1? Give your answer rounded to two decimal places.

____%

(c). Your doctor tells you you are in the 30th percentile (e.g. bottom 30%) for blood pressure among US adults. What is your systolic BP? Give your answer rounded to two decimal places.

___Ibs

Math   Statistics-And-Probability   
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