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Part 1

A health study reported that, in one country, systolic blood pressure readings have a mean of 116 and a standard deviation of 14.

A reading above 140 is considered to be high blood pressure. Complete parts a through d below.

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Part 1

a. What is the z-score for a blood pressure reading of 140?

z=1.71

(Round to two decimal places as needed.)

Part 2

b. If systolic blood pressure in that country has a normal distribution, what proportion of the population suffers from high blood pressure?

The proportion with high blood pressure is 0.0436.

(Round to four decimal places as needed.)

Part 3

c. What proportion of the population has systolic blood pressure in the range from 104 to 140?

The proportion with systolic blood pressure between 104 and 140 is _____

enter your response here.

(Round to four decimal places as needed.)