2.124 Blood pressure A World Health Organization study (the MONICA project) of health in various countries reported that in Canada, systolic blood pressure readings have a mean of 121 and a standard deviation of 16. A reading above 140 is considered to be high blood pressure.

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

How is this z-score interpreted?

b. The systolic blood pressure values have a bell-shaped distribution. Report an interval within which about 95% of the systolic blood pressure values fall.