User Guide for the TIMSS International Database.pdf - TIMSS and ...

P E R F O R M I N G A N A L Y S E S C H A P T E R 9
Figure 9.9
SAS Control Statements for Performing Analyses with Student-Level Variables
(EXAMPLE1.SAS)
options nocenter;
* Read the variables from the student file;
data student;
set bsgall1
(keep=idcntry idgrader jkindic jkzone totwgt bsbgday1 bimatscr);
where idgrader=2 and nmiss(bsbgday1)=0; * Select only 8th graders;
if bsbgday1=1 then bsbgday1=2;
* Define the format for the variables used;
proc format library=work;
value grade 1 = "Seventh Grade " 2 = "Eighth Grade ";
value seetv 2 = "Less than 1 Hr " 3 = "1 to 2 hrs. "
4 = "3 to 5 hrs. " 5 = "More than 5 hrs ";
value country
036 = "Australia " 040 = "Austria " 056 = "Belgium (Fl) "
057 = "Belgium (Fr) " 100 = "Bulgaria " 124 = "Canada "
170 = "Colombia " 196 = "Cyprus " 200 = "Czech Republic "
208 = "Denmark " 826 = "England " 250 = "France "
280 = "Germany " 300 = "Greece " 344 = "Hong Kong "
348 = "Hungary " 352 = "Iceland " 364 = "Iran, Islamic Rep. "
372 = "Ireland " 376 = "Israel " 380 = "Italy "
392 = "Japan " 410 = "Korea " 414 = "Kuwait "
428 = "Latvia (LSS) " 440 = "Lithuania " 528 = "Netherlands "
554 = "New Zealand " 578 = "Norway " 608 = "Philippines "
620 = "Portugal " 642 = "Romania " 643 = "Russian Federation "
827 = "Scotland " 702 = "Singapore " 201 = "Slovak Republic "
890 = "Slovenia " 717 = "South Africa " 724 = "Spain "
752 = "Sweden " 756 = "Switzerland " 764 = "Thailand "
840 = "United States" ;
* Now use the macro JACK to get the results;
%include "jack.sas";
%jack (totwgt,jkzone,jkindic,75,idcntry idgrader bsbgday1,bimatscr,student);
proc print data=final noobs;
by idcntry idgrader;
where idgrader = 2;
var bsbgday1 N totwgt mnx mnx_se pct pct_se;
format idcntry country. idgrader grade. bsbgday1 seetv.;
T I M S S D A T A B A S E U S E R G U I D E 9 - 2 3