Graph description: Regression towards the mean, 17

The figure shows a scatter plot of two pulse rates, the first measurement on the horizontal axis, the second on the vertical axis. There is a fairly strong relationship (r=0.68). The line of equality is shown at 45 degrees to the two axes.

The right hand side of the graph is shaded from first pulse = 90 beats per minute. The observed means for this subgroup are shown by a point at first = 100.2, second = 90.4.

The predicted second pulse is shown by a horizontal line at 91.2.

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This page maintained by Martin Bland.
Last updated: 21 January, 2004.