Thank you everybody. Actually i am using SPSS for my study and came across with some problems. i.e creating new variables from sec.data. coz i need to analyse the results using log. regression and chi sq.test frm the variables created. So if anyone can share her/his knowledge! MR. wakil1 ty for ur help. I am using books and software SPSS version 12. Dannah,, Yatree and Hansy420, did u all get me now why i need it! Please take it seriously. Thank you gal1