A histogram for a discrete variable: a graph where the horizontal axis is labeled Episodes since first onset of ulcer and numbered 0, 10, 20, 30, 40, 50, 60 with ticks at each integer. The vertical axis is labeled Frequency and numbered 0, 50, 100, 150.

Narrow bars which do not touch rise at integer numbers of episodes. The bars are defined by Episodes since first onset of ulcer and Frequency as follows: 0 and 11, 1 and 145, 2 and 101, 3 and 39, 4 and 23, 5 and 14, 6 and 9, 7 and 4, 8 and 6, 9 and 1, 10 and 9, 13 and 1, 15 and 1, 17 and 1, 20 and 3, 26 and 1, 29 and 1, 40 and 1, 50 and 3, 64 and 1.

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

This page maintained by Martin Bland.

Last updated: 2 August, 2006.