Keywords: Multiple regression, gamma regression, dispersion modelling.
The data give the volume (cubic feet), height (feet) and diameter (inches) (at 54 inches above ground) for a sample of 31 black cherry trees in the Allegheny National Forest, Pennsylvania. The data were collected in order to find an estimate for the volume of a tree (and therefore the timber yield), given its height and diameter.
Data File (tab-delimited text)
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