TY - BOOK AU - RIZVI, Syed Ejaz Husain TI - Optimum stratification for two study variables using auxiliary information U1 - T 517.8 R55O PY - 1997/// CY - Ludhiana PB - PAU KW - VARIABLES (MATHEMATICS) KW - OPTIMUM STRATIFICATION KW - STRATIFIED SAMPLING KW - TWO STUDY VARI N2 - Theory has been developed for optimum stratification, when two characters(Y,Z) of the population are under study, using auxilliary information(X) Minimal equations, giving optimum strata boundaries, have been obtained for stratified simple random sampling ER -