Question

1. Write a SAS program to create a SAS dataset BIG which has 100 observations of X=INT(RANUNI(0)*100+1). Print X values only from the dataset BIG.

2. Use the dataset BIG to create a 5% random samlple called SMALL. Solve this problem with an approximate solution using a teset with IF statement for the value of a random variable.

Answer 1

1.

DATA BIG;
   DO SUBJ = 0 TO 100 ;
      X=INT(RANUNI(0)*100+1);
      OUTPUT;
   END;
RUN;

%LET X = 4; DATA EVERY_X;
   SET BIG;
   IF MOD(_X_ ,&X) = 1;

RUN;

PROC PRINT DATA=EVERY_X NOOBS;
   TITLE "Listing of Data Set EVERY_X";

RUN;