data propthirdinstarcounty;
infile "Bioassay - prop third instar data.csv" dlm=',' firstobs=2;
input pop $ corn $ number survived third propthird;
arsinpropthird=arsin(propthird);
asr_propthird=arsin(sqrt(propthird));
run;
proc print;
run;

proc sort;
by pop;
run;
proc ttest sides=L;
class corn;
var asr_propthird;
by pop;
run;