@Ankur....3 things are most important in econometrics....Outcome, Predicted & Average of a sample data....this is the most important thing to predict (very likewise in Astrology) from a Sociological view...what to predict and how to predict? this is the key question of this study....So we first measure an average of a society which is called in our language AAMJANATA....one more important thing is prediction of AAMJANATA...now total sum of Squares (SST) = Summation (outcome - average) ^2....then what is residual and what is error term in this regard....please find it