All observations don't have equal significance in regression analysis.Diagnostics of observations is an im
portant aspect of model building.In this dissertation,we use diagnostics method to detect residuals and influential points in no
nlinear regression for repeated measurement data.Cook distance,likelihood distance and Gauss newton method have been proposed to identify the outliers in no
nlinear regression analysis and parameter estimation.Most of these techniques ba
sed on graphical representations of residuals,hat matrix and case deletion measures.The results show us detection of single and multiple outliers cases in repeated measurement data by Cook.Distance and Likelihood distance.We use these techniques to explore performance of residuals and influence in no
nlinear regression model.
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