Conditions of applications. Key concepts. Testing conditions of applications in complex study design Residuals Tests of normality Residuals plots Residuals vs. fitted QQ plots Cook’s distance. Conditions of applications.
Where Yj are the predicted values of Y, and Yj(i) are the predicted values of Y if observation i was removed and the model was estimated again.
p is the number of parameters of the model and MSE is the mean square error.
Cutoff: 1 or 4/n or Fp,n-p