The Normal plot shows Inverse Normal on the horizontal axis and Glucose residuals on the vertical axis. The Inverse Normal scale is minus 4, minus 2, 0, 2, 4. The Glucose scale is also minus 4, minus 2, 0, 2, 4.
There is a line from Inverse Normal = minus 2, Glucose residual = minus 2, to Inverse Normal = 2, Glucose residual = 2.
There are 43 points scattered about the line. The first point is below the line, at about Inverse Normal = minus 2, Glucose residual = minus 2.6. The next two points are just above the line, then the points are all on the line until the last three, which are above the line, the last one being clearly above it at Inverse Normal = 2, Glucose residual = 2.6.
Back to Inference about means.
This page maintained by Martin Bland.
Last updated: 24 July, 2009.