? Example 1.1 from Pindyck & Rubinfeld Handbook
? 8 observations of data on gradepoint average and family income.

freq n ;           ? frequency of data is none (cross section data)
smpl 1 8 ;

? Sample and frequency are set; read in data.

read y x ;
4 21 3 15 3.5 15 2 9 3 12 3.5 18 2.5 6 2.5 12;

show series ;      ? to see information on series read.
print y x ;        ? to see contents of series.
msd y x ;          ? to see the means and std. deviations of series.
olsq y c x ;       ? a simple regression (like figure 1.2 of P&R).

?graph x y @fit ;   ? to see a screen plot, issue this command interactively.

stop ; end ;