TY  - BOOK
AU  - MANPREET Kaur
TI  - On ratio estimate under probality proportional to size sampling
U1  - T 311.212 M30O 
PY  - 1994///
CY  - Ludhiana
PB  - PAU
KW  - SAMPLING (STATISTICS)
N2  - In the present thesis, the estimators like ratio, product and an improved PPS estimator of population mean are obtained in which sample information from the latest auxiliary variable along with the known auxiliary variable is used. Expressions for bias an
ER  -