options linesize = 72 ;

data milk ;
infile '/group/ftp/pub/kcowles/datasets/milk.dat' ;
input current prev fat protein days lact i79 ;
run ;

proc print data = milk (obs = 15) ;
run ;

proc reg data = milk ;
model current = previous fat protein dys lact i79 / influence tol vif ;
run ;
plot residual. * predicted. ;
run ;