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 position of the first quartile is shown at serum cholesterol = 5.1. The position of the median is shown at serum cholesterol = 6.15. The position of the first quartile is shown at serum cholesterol = 7.2.

Back to Clinical Biostatistics: Data, frequencies, and distributions.

This page maintained by Martin Bland.

Last updated: 2 August, 2006.