Population and Sampling Techniques

اضغط الوصلة https://www.google.com/search?sca_esv=803cfa2ecf2f59a2&sca_upv=1&sxsrf=ACQVn0-Sdnem-qTTI2y2T7f2-n_-P-D49g:1713274591480&q=population+and+sampling&tbm=vid&source=lnms&prmd=ivsnbmtz&sa=X&ved=2ahUKEwjG3bWb7caFAxX2UaQEHX9zBJQQ0pQJegQIDBAB&biw=1366&bih=657&dpr=1#fpstate=ive&vld=cid:4feac35c,vid:jPPF2xSEyKU,st:0 لفتح المصدر.