Graph description: Figure 5. Within-subject residuals against subject mean for the data of Table 2

This is a scatter diagram, showing mean PEFR for the subject on the horizontal axis and the individual PEFR measurements minus the subject mean on the vertical axis. There is no sign of a relationship. The vertical spread of the points very similar all the way, with range about 70 litres per minute.

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Last updated: 21 April, 2008.