data multifreq;
groupmin=0.41;                            /*指定多组中最小的率*/
groupmax=0.65;                            /*指定多组中最大的率*/
lamda=9.63;                               /*通过查表确定λ值*/
ntotal=ceil(2*lamda/(2*(arsin(sqrt(groupmax))-arsin(sqrt(groupmin))))**2);
proc print;
run;
