options ls=80 ps=70;

data birthweight;
 input age $ birthweight @@;

datalines;
<20 8.4 <20 7.3 <20 9.1 <20 7.8 <20 8.4
20-29 7.5 20-29 6.3 20-29 6.9 20-29 5.4 20-29 7.1
30+ 6.9 30+ 7.1 30+ 5.7 30+ 6.5 30+ 6.6
;

proc anova data=birthweight;
 class age;
 model birthweight=age;
 means age/tukey;

run;

proc glm data=birthweight;
 class age;
 model birthweight=age;
 means age/scheffe;

run;