The MEANS Procedure

Example 3: Using the BY Statement with Class Variables

Procedure features:

PROC MEANS statement option:

statistic keywords

BY statement

CLASS statement

Other features:

SORT procedure

Data set:

GRADE

This example

separates the analysis for the combination of class variables within BY values
shows the sort order requirement for the BY statement
calculates the minimum, maximum, and median.

Program

options nodate pageno=1 linesize=80 pagesize=60;

proc sort data=Grade out=GradeBySection;
   by section;
run;

proc means data=GradeBySection min max median;

   by Section;

   var Score;

   class Status Year;

   title1 'Final Exam Scores for Student Status and Year of Graduation';
   title2 ' Within Each Section';
run;

Output

          Final Exam Scores for Student Status and Year of Graduation          1
                               Within Each Section

---------------------------------- Section=A -----------------------------------

                              The MEANS Procedure

                          Analysis Variable : Score 
 
                         N
     Status    Year    Obs         Minimum         Maximum          Median
     ---------------------------------------------------------------------
     1         97        1      85.0000000      85.0000000      85.0000000

               98        1      92.0000000      92.0000000      92.0000000

     2         97        3      82.0000000      90.0000000      88.0000000
     ---------------------------------------------------------------------


---------------------------------- Section=B -----------------------------------

                          Analysis Variable : Score 
 
                         N
     Status    Year    Obs         Minimum         Maximum          Median
     ---------------------------------------------------------------------
     1         97        2      78.0000000      91.0000000      84.5000000

               98        2      84.0000000      89.0000000      86.5000000

     2         98        1      81.0000000      81.0000000      81.0000000
     ---------------------------------------------------------------------

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