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Graph description: How do I compare methods of measurement which give results in different units?, 2

The figure shows a plot of FEV against PEF: FEV on the vertical axis, PEf on the horizontal axis.
Each point from the table is plotted as a circle and there is a positive relationship.
Subjects with high PEF tend to have high FEV.
The regression line, the line of best fit, is shown. It has a positive gradient.

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Sample size for a study of agreement between two methods of measurement.

This page maintained by Martin Bland.

Last updated: 12 January, 2004.