According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg (Kuulasmaa, Hense & Tolonen, 1998). Assume that blood pressure is normally distributed.
- Find the probability that a person in China has blood pressure of 135 mmHg or more:
- Is it unusual for a person in China to have a blood pressure of 135 mmHg? Why or why not?
- What blood pressure do 90% of all people in China have less than?