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, 20, 40, 60.
There are vertical bars with bases 40 to 60, 60 to 80, 80 to 100, 100 to 120, and so on, and with heights 2, 29, 49, 57, 16, 15, 36, 22, 20, 3, 1.
Back to Data, frequencies, and distributions.
This page maintained by Martin Bland.
Last updated: 22 July, 2009.