According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg. Assume that blood pressure is normally distributed. What is the random variable in this problem? rv X= the blood pressure of a randomly selected person in China v OF In the remaining questions, round all probabilities to four decimal places. It is possible that, after rounding, your answer may be zero. Read your calculator carefully. Find the probability that a randomly selected person in China has a blood pressure of 70.4 mmHg or more. Find the probability that a randomly selected person in China has a blood pressure of 81.8 mmHg or less. Find the probability that a randomly selected person in China has a blood pressure between 70.4 and 81.8 mmHg.

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