Regression analysis (or, more specifically, linear regression analysis) finds a "line of best fit" between a response variable and one or more explanatory variables. This applet allows users to look ...

A formula is derived for determining the number of observations necessary to test the equality of two survival distributions when concomitant information is incorporated.

In particular, if the linear regression relation contains p parameters, minimizing the sum of the absolute value of the "vertical" deviations from the regression line is shown to reduce to a p ...