TY  - GEN
AU  - Lev, Joseph
AU  - walker, Hellen M
TI  - Elementary statistical methods
U1  - 519.5 WAL 
CY  - Calcutta, Oxford IBH publishing co., 36, chowringhee road
KW  - Statistical methods/graphic methods-statistics/regression/standard deviation -mean/correlation/testing hypothesis
ER  -