My set (mysas.test1) executes successfully when I use proc means, but not with the code above. I have tried using a different data set and the second data set executes successfully as well. ... View more

data sum; set mysas.test1 end=end nobs=nobs; array orig(50) item1-item50; array sums(50) sum1-sum50; do i = 1 to 50; sums(i)+orig(i); end; if end then do; do j = 1 to 50; Item=vname(orig(j)); ItemDifficultyIndex=sums(j)/nobs; sum=sums(j); output; end; end; drop i j sum1-sum50; data sum; set sum; if ItemDifficultyIndex ge .70 then Level='+'; if ItemDifficultyIndex lt .30 then Level='-'; title "Item Difficulty (Easiness/Popularity/Prevalence) Indexes"; title3 "Analysis for All Items"; title5 "+ = Easy Item - = Difficult Item"; proc print; var Item ItemDifficultyIndex Level; run; title; proc means Data=sum n mean std min max maxdec=2 fw=5; title "Analysis for All Items"; var ItemDifficultyIndex; run; data sum; set sum; if Level =' '; title "Item Difficulty (Easiness/Popularity/Prevalence) Indexes"; title3 "Analysis for Retained Items"; proc print; var Item ItemDifficultyIndex; run; title; proc means Data=sum n mean std min max maxdec=2 fw=5; title3 "Analysis for Retained Items"; var ItemDifficultyIndex; run; title; ... View more