In a study of 1 329 American men reported in American
In a study of 1,329 American men reported in American Statistician [(1974) 28: 115–122], the men were classified by serum cholesterol and blood pressure. The group of 408 men who had blood pressure readings less than 127 mm Hg were then classified according to their serum ­cholesterol level.
Serum Cholesterol (mg/ 100cc) Frequency
0.0–199.9 ……………………………………… 119
200.0–219.9 …………………………………… 88
220.0–259.9 …………………………………… 127
greater than 259 ………………………………… 74
a. Estimate the mode, median, and mean for the serum cholesterol readings (if possible).
b. Which of the three summary statistics is most informative concerning a typical serum cholesterol level for the group of men? Explain your answer.
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