TY  - BOOK
AU  - Ritchey,Ferris Joseph
TI  - The statistical imagination: elementary statistics for the social sciences 
SN  - 0072891238
AV  - HA29 .R51 2000
PY  - 2000///
CY  - Boston, 
PB  - McGraw-Hill
N1  - Includes bibliographical references (p. 591-593) and index
ER  -