The SURVEYREG Procedure

Adjusted R-Square

If you specify the ADJRSQ option in the MODEL statement, PROC SURVEYREG computes an multiple R-square adjusted as the weighted regression as

\[ \mbox{ADJRSQ} = \left\{ {\begin{array}{ll} 1 - \displaystyle \frac{n(1 - R^2)}{n - p} & \mbox{if no intercept}\\ 1 - \displaystyle \frac{(n - 1)(1 - R^2)}{n - p} & \mbox{otherwise} \end{array}} \right. \]

where $R^2$ is the multiple R-square.