This is a preview. Log in through your library . Abstract Characterizations of the normal, Poisson and gamma distributions are obtained from the condition of constant regression of a quadratic ...

Residual plots can be used to validate assumptions about the regression model. Figure 1: Residual plots are helpful in assessments of nonlinear trends and heteroscedasticity. A formal test of lack of ...

When products start failing, management wants answers. Are they failing because of manufacturing problems? Or is the design to blame? One of the most widely regarded methods for ferreting out the ...