Model Selection Criteria have become exceedingly popular in the Time
Series/Forecasting and Applied Regression Analysis. The problem of model
selection has long term of interest statisticians .In the Applied
Regression analysis, one is faced with a large number of explanatory
variables which are potentially important for the specification of the
model.Selecting the best statistical model is an important problem in
statistics as well as in any other field that uses regression
analysis.The problem of reducing the number of regressors in the
prediction equation of Multiple regression analysis has received and
shall continue to receive considerable attention in the statistical
analysis. In the present research study, the various Selection Criteria
for best regression models have been developed by using studentized
residuals.