Pulmonary Disease:  5.12: Assuming that the duration of smoking is normally distributed, what proportion of men in this age group have smoked for more than 20 years?

Cardiovascular Disease: 5.16: What proportion of the general population has borderline high-cholesterol levels—that is, > 200 but < 250 mg/dL?

Hypertension: 5.18: What proportion of 15- to 44-year-olds are hypertensive?

5.47: If the mean plasma-aldosterone level in black children was 230 pmol/L with a standard deviation of 203 pmol/L, then what percentage of black children have levels ≤ 300 pmol/L if normality is assumed?

5.48: If the mean plasma-aldosterone level in white children is 400 pmol/L with standard deviation of 218 pmol/L, then what percentage of white children have levels ≤ 300 pmol/L if normality is assumed?

5.49: The distribution of plasma-aldosterone concentration in 53 white and 46 black children is shown in Figure 5.23. Does the assumption of normality seem reasonable? Why or why not?

Blood Chemistry: 5.31: If the normal range is 65−120 mg/dL, then what percentage of values will fall in the normal range?

5.32: In some studies only values at least 1.5 times as high as the upper limit of normal are identified as abnormal. What percentage of values would fall in this range?

5.35: Suppose that in a pharmacologic study involving 6000 patients, 75 patients have blood-glucose levels at least 1.5 times the upper limit of normal on one occasion. What is the probability that this result could be due to chance?

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