1. 5-4 The Paired t-Test OPTIONS NOOVP NODATE NONUMBER ls=80;
DATA INSURE;
INPUT FIRST SECOND
DIFF=FIRST-SECOND;
IF DIFF < 0 THEN IND=1;
ELSE IND=0;
ABSDIFF=ABS(DIFF);
CARDS;
ods graphics on;
PROC UNIVARIATE DATA=INSURE NORMAL PLOT;
VAR DIFF;
TITLE ‘Wilcoxon Signed Rank Test and t-test';
PROC RANK DATA=INSURE OUT=RINSURE;
VAR ABSDIFF;
DATA RINSURE;
SET RINSURE;
IF IND=1THEN ABSDIFF=-ABSDIFF;
PROC UNIVARIATE DATA=RINSURE normal;
TITLE 'Wilcoxon Signed Ranks Test';
RUN; ods graphics off;
QUIT;

2. 5-4 The Paired t-Test

3. 5-4 The Paired t-Test

4. 5-4 The Paired t-Test