Figure 1.

Typical datasets for normally or log-normally distributed X (each with mean 2 and variance 1), normally distributed Y with mean 2X + X2 or (X - 2)2, and R2 = 0.1, 0.5 or 0.8. Dotted line shows expected value of Y given X.

Seaman et al. BMC Medical Research Methodology 2012 12:46   doi:10.1186/1471-2288-12-46
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