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112 9 Programs and procedures11 LIST=yes " whether >1 setting can be given "12 PARAMETER 'Y','X','Corr','Prob'; \13 MODE=p; "default - expects an identifier list "\14 TYPE=2('variate','scalar'); \15 SET=2(yes,no); "X & Y must be set (but not Corr & Prob)"\16 INPUT=2(yes,no); "X & Y only for input (but not ...) "\17 DECLARED=2(yes,no); "X & Y must have been declared (but ...)"\18 PRESENT=2(yes,no); "X & Y must have values (but not ...) "\19 COMPATIBLE=*,'nvalues',*,* "X must have same no. values as Y"2021 SET [CASE=significant]22 ASSIGN [METHOD=preserve] corr,prob; POINTER=Corr,Prob2324 CALCULATE Corr = CORRELATION(Y; X)25 & Nobservations = NOBS(Y + X)26 & Abscorr = ABS(Corr)27 PRCORRELATION [NOBSERVATIONS=Nobservations] \28 Abscorr; CUPROBABILITY=Prob29 CALCULATE Prob = 0.5 * Prob3031 IF SUM(!t(correlation,nobservations) .IN. PRINT)32 CAPTION 'Correlation test'; STYLE=minor33 IF 'correlation' .IN. PRINT34 IF Prob .LE. 0.00135 PRINT [IPRINT=*] 'Correlation',Corr,'Probability < 0.1%';\36 FIELD=11,7,20; DECIMALS=3; JUSTIFICATION=left37 ELSIF Prob .LE. 0.0138 PRINT [IPRINT=*] 'Correlation',Corr,'Probability < 1%';\39 FIELD=11,7,20; DECIMALS=3; JUSTIFICATION=left40 ELSIF Prob .LE. 0.0541 PRINT [IPRINT=*] 'Correlation',Corr,'Probability < 5%';\4243 ELSEFIELD=11,7,20; DECIMALS=3; JUSTIFICATION=left44 PRINT [IPRINT=*] 'Correlation',Corr,'Not significant';\45 FIELD=11,7,20; DECIMALS=3; JUSTIFICATION=left46 ENDIF47 ENDIF48 IF 'nobservations' .IN. PRINT49 PRINT [IPRINT=*] 'Number of observations:',Nobservations;\50 DECIMALS=0; JUSTIFICATION=left51 ENDIF52 ENDIF5354 ENDPROCEDURE5556 CORTEST [PRINT=*] Y=Water; X=Employ; CORR=Cor; PROB=Pr57 PRINT Cor,PrCor Pr0.4132 0.0248058 CORTEST Y=Water; X=EmployCorrelation testCorrelation 0.413 Probability < 5%In line 31, SUM(!t(correlation,nobservations).IN.PRINT) will be non-zero(i.e. true) if PRINT contains either of the two tokens. So the this expression checkswhether any printed output is required. In line 32, we use the CAPTION directive todisplay a title for the analysis (see Section 4.8 for an explanation). In line 56, we verifythat setting PRINT=* suppresses the printed output, and that we can use the CORR andPROB parameters to save the correlation and probability. In line 58 we call the procedure