Hi, I was wondering whether it is correct to analyze the dependent variable X on a Likert scale (scale 1 -5) with the independent variables TRT (1, 2, 3 and 4) and product (A, B and C) with this model:   proc logistic; class trt product; model X (EVENT='1')=trt product; run;   or this one:   proc glm; class trt product; model X=trt product/solution; means trt product/hovtest; lsmeans trt product/pdiff  adjust=tukey  ; run;   Thank you in advance, Alen ... View more

Hello all, Need help with this class assignment for students which does not work properly. Here is the SAS code: /* example 1 */ data merge1; input ID $ SEX $ BDATE SALARY NAME $ ; informat BDATE mmddyy8. ; format BDATE mmddyy8. ; datalines; 1 M 10/21/46 70000 ivan 2 F 11/01/55 68000 judy 7 M 01/27/59 47000 ralph ; run; data merge2; input ID $ SEX $ BDATE SALARY TAXRATE WITHHOLD NAME $ ; informat BDATE mmddyy8. ; format BDATE mmddyy8. ; datalines; 3 F 01/01/33 78000 .36 23000 zoe 5 M 03/07/29 37000 .25 9000 marco ; run; data merge3; input ID $ SEX $ BDATE SALARY HEIGHT WEIGHT NAME $ ; informat BDATE mmddyy8. ; format BDATE mmddyy8. ; datalines; 4 M 10/23/49 65000 68 158 roger 6 F 07/04/65 55000 74 202 clara ; run; data all (keep= ID BDATE SALARY NAME rename=(NAME=NAME1)) ; set merge1 merge2 merge3 ; where BDATE <= 01/01/60 and SALARY GE 50000 ; format BDATE mmddyy8. ; run; proc print ; run; This is our output: The problem is that it does not select ID 3 zoe from the dataset merge2.   Any ideas? Best,   Alen ... View more