dr.zaki
if you want to make a comparison between two groups before and after treatment, i have a moderate idea about performing the statistics using spss, if you want me to help, you are welcome.
بالضبط هو ده اللي انا عاوزه تقريبا .. بس انا شايف حضرتك كاتب انك في اليمن ؟
المفضلات