Check our blood pressure: In a recent study, the Centers for Disease Control and prevention reported that diastolic blood pressures of adult women in the United States are approximately normally distributed with mean 80.4 and a standard deviation of 9.8. (a) What proportion of women have blood pressures lower than 65? (b) What proportion of women have blood pressures between 72 and 90? (c) A diastolic blood pressure greater than 90 is classified as hypertension (high blood pressure). What proportion of women have hypertension? (d) Is it unusual for a woman to have a blood pressure lower than 63? Round the answers to four decimal places.

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