filename regr 'h:\HAL\Courses\Stat210\Kutner5th\univadmit.txt';
options linesize=80;
data regdata;
    infile regr firstobs=1;
    input id gpa rank act year;
proc gplot;
    plot gpa*rank gpa*act;
proc means;
    var gpa rank act;
proc corr;
    var gpa rank act;
**                                                                      **;
** Note the output command in the regression procedure                  **;
** below identifies a new data file (out = resids)                      **;
** that will contain all current variables plus new variables specified **;
** on the command.  p is code for predicted values and yhat is the name **;
** that I am assigning.  r is code for ordinary residuals and resid is  **;
** the name that I am assigning.  etc.  The options for the output line **;
** and other reg commands can be found in the PROC REG manual page on   **;
** the course web site                                                  **;
**                                                                      **; 
proc reg;
    model gpa = act / p r cli clm;
    output out = resids p = yhat r = resid student = studres;
**                                                 **;
** next two procedures produce residual plots      **;
**                                                 **;
proc rank normal=blom data = resids out = norm;
    var studres;
    ranks nrm;
proc gplot data=norm;
    plot studres*nrm studres*yhat;
run;