The examples in this section are based on data from university test scores. The data contains test scores for entering university classes from 2005 to 2011. For a complete listing of the input data, see The UNIVERSITY_TEST_SCORES Data Set. The input file has the following structure:

Verbal f 2009 503
Verbal m 2010 507 
Verbal f 2010 503
Verbal m 2011 509 
Verbal f 2011 502
Math   m 2005 521 
Math   f 2005 484
Math   m 2006 524 
Math   f 2006 484

The input file contains the following values from left to right:

The following program creates the data set that this section uses:

data test_scores;
   input Test $ Gender $ Year TestScore;
   datalines;
Verbal m 2005 504 
Verbal f 2005 496
Verbal m 2006 504 
Verbal f 2006 497
Verbal m 2007 501 
Verbal f 2007 497
   ... more data lines ...
Math   f 2009 492
Math   m 2010 530 
Math   f 2010 494
Math   m 2011 531 
Math   f 2011 496
;