A histogram of serum cholesterol: a graph where the horizontal axis is labeled serum cholesterol and numbered 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and the vertical axis is labeled frequency and numbered 0, 5, 10, 15, 20, 25.
There are vertical bars with bases 3 to 4, 4 to 5, 5 to 6, 6 to 7, and so on, with heights 3, 11, 24, 20, 19, 5, 2, and 2.
The mean minus two standard deviations is shown at serum cholesterol = 3.54. The mean minus one standard deviation is shown at serum cholesterol = 4.94. The mean is shown at serum cholesterol = 6.34. The mean plus one standard deviation is shown at serum cholesterol = 7.74. The mean plus two standard deviations is shown at serum cholesterol = 9.14.
Back to Clinical Biostatistics: Data, frequencies, and distributions.
This page maintained by Martin Bland.
Last updated: 2 August, 2006.