Several measurements of 42 beech trees (Fagus Sylvatica) taken from a forest in Navarra (Spain).
A data frame with 42 observations on the following 4 variables:
diameter of the stem in centimeters
height of the tree in meters
weight of the stem in kilograms
aboveground weight in kilograms
Gobierno de Navarra and Gestion Ambiental Viveros y Repoblaciones de Navarra, 2006. The data were obtained within the European Project FORSEE.
Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.