تعيين طبقات در نمونه گيري هاي چند منظوره ياطبقه بندي شده

Deterinination of Strata in Multiuse or Stratified Sampling

In this paper, principal component and cluster analyses were used to classify population units into homogeneous strata. The resulting stratification was compared with the strata obtained by using delenius method based on some efficiency criteria. The numerical study showed that the new stratification methods are in general more efficient.