? P&R Exercise 17.3

options crt limwarn=0;
freq m;
smpl 50:1 96:3;
read(file='\tsp\prhb\datadisk\ex161.xls', format=excel) fygn3;
r=fygn3;

smpl 59:12 96:2;
bjest(const,nar=2,ndiff=1,nma=2,nocumplo,noplot,maxit=50)  r;