Regression Diagnostics John Maindonald October 7, 2013 1 Calibration of Regression Diagnostics Indications of departures from regression assumptions in diagnostic plots may reflect sampling variation. This is an especial issue for relatively small datasets. Diagnostic plots for a number of sets of simulated data may be an essential aid to judgement. In e↵ect, the observed diagnostic plot is jud...

We examine the relationship between disturbance regime and plot size for woody biomass estimation in a midwestern old-growth deciduousforestfrom 1926 to 1992. Analysis was done on the core 19.6 ac of a 50. I ac forest in which every tree 4 in. dbh and greater has been tagged and mapped since 1926. Five windows of time are compared-1926, 1976, 1981, 1986 and 1992. The most ejficient plot sizes r...

We present interval analysis based procedures for construction of the well-known Bode and Nyquist frequency response plots for nonrational transfer functions. The proposed procedures can be used to construct the plots reliably and to a prescribed accuracy over a user-specified frequency range. The procedures overcome the limitations of the only available method for nonrational transfer function...

Although esophageal extrusa is the most readily accepted representation of forage consumed by grazing ruminants, esophageal sampling is demanding from the standpoint of animal care and maintenance and extrusa processing. This experiment was conducted with a split-plot design to evaluate the effects of pasture type, pasture sampling technique and drying method on estimation of grazed forage comp...