options ls=78;

data class5;

infile 'class5.txt';

input sn gender $ anxiety memory bfperf afperf;

sqanx=sqrt(anxiety);

lgmem=log(memory);

tdiff=(afperf-bfperf);

ctdiff=(tdiff+64);

run;

proc print data=class5;

run;

proc univariate data=class5 plot normal;

var anxiety sqanx memory lgmem bfperf afperf ctdiff;

title 'name, calculating univariate to examine skew';

run;

proc chart data=class5;

vbar anxiety sqanx memory lgmem bfperf afperf ctdiff / levels=12;

title 'name, histograms of data';

run;

proc sort data=class5;

by gender;

run;

proc univariate data=class5 plot normal;

by gender;

var anxiety sqanx memory lgmem bfperf afperf ctdiff;

title 'name, univariate when sorting by gender to examine skew';

run;

proc chart data=class5;

by gender;

vbar anxiety sqanx memory lgmem bfperf afperf ctdiff;

title 'name, histograms of data when sorting by gender';

run;

proc ttest data=class5;

class gender;

var sqanx lgmem bfperf ctdiff;

title 'name, examining the differences between genders';

run;

quit;