ods pdf; ods graphics on; proc ttest data=teaching; var rating; run; ods graphics off; ods pdf close; ******************************** * Example 2, p. 645 (Chapter 15) ********************************; data teaching; input rating attend $; if attend='Attended'; * only keep those who attended; datalines; 4.8 Attended 6.4 Attended 6.3 Attended 6.0 Attended 5.4 Attended 5.8 Attended 6.1 Attended 6.3 Attended 5.0 Attended 6.2 Attended 5.6 Attended 5.0 Attended 6.4 Attended 5.8 Attended 5.5 Attended 6.1 Attended 6.0 Attended 6.0 Attended 5.4 Attended 5.8 Attended 6.5 Attended 6.0 Attended 6.1 Attended 4.7 Attended 5.6 Attended 6.1 Attended 5.8 Attended 4.8 Attended 5.9 Attended 5.4 Attended 5.3 Attended 6.0 Attended 5.6 Attended 6.3 Attended 5.2 Attended 6.0 Attended 6.4 Attended 5.8 Attended 4.9 Attended 4.1 Attended 6.0 Attended 6.4 Attended 5.9 Attended 6.6 Attended 6.0 Attended 4.4 Attended 5.9 Attended 6.5 Attended 4.9 Attended 5.4 Attended 5.8 Attended 5.6 Attended 6.2 Attended 6.3 Attended 5.8 Attended 5.9 Attended 6.5 Attended 5.4 Attended 5.9 Attended 6.1 Attended 6.6 Attended 4.7 Attended 5.5 Attended 5.0 NotAttend 5.5 NotAttend 5.7 NotAttend 4.3 NotAttend 4.9 NotAttend 3.4 NotAttend 5.1 NotAttend 4.8 NotAttend 5.0 NotAttend 5.5 NotAttend 5.7 NotAttend 5.0 NotAttend 5.2 NotAttend 4.2 NotAttend 5.7 NotAttend 5.9 NotAttend 5.8 NotAttend 4.2 NotAttend 5.7 NotAttend 4.8 NotAttend 4.6 NotAttend 5.0 NotAttend 4.9 NotAttend 6.3 NotAttend 5.6 NotAttend 5.7 NotAttend 5.1 NotAttend 5.8 NotAttend 3.8 NotAttend 5.0 NotAttend 6.1 NotAttend 4.4 NotAttend 3.9 NotAttend 6.3 NotAttend 6.3 NotAttend 4.8 NotAttend 6.1 NotAttend 5.3 NotAttend 5.1 NotAttend 5.5 NotAttend 5.9 NotAttend 5.5 NotAttend 6.0 NotAttend 5.4 NotAttend 5.9 NotAttend 5.5 NotAttend 6.0 NotAttend ;