A histogram of systolic blood pressure.

The horizontal axis is labeled Systolic blood pressure (mm Hg) and numbered 50, 100, 150, 200, 250, with ticks every 10 units. The vertical axis is labeled Frequency and numbered 0, 10, 20, 30.

There are vertical bars with bases 80 to 100, 100 to 120, 120 to 140, 140 to 160, 160 to 180, 180 to 200, and 200 to 260. The last bar is much wider than the others. The heights of the bars are 2, 16, 36, 29, 5, 2, and 0.67.

The last bar is only one third of the height of the last bar in Figure 7.

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

This page maintained by Martin Bland.

Last updated: 2 August, 2006.