Data on 31 black cherry trees sampled from the Allegheny Natinoal Forest, Pennsylvania.
This data frame contains the following columns:
diameter 4.5 feet of the ground, inches
height of the tree, feet
marketable volume of wood, cubic feet
Ryan, T.A., Joiner, B.L. and Ryan, B.F. (1976) Minitab Student Handbook. N. Scituate, MA: Duxbury.
Cook, R.D. and Weisberg, S. (1982) Residuals and Influence in Regression, New York: Chapman and Hall, p. 66.