I have a dataset of 500 people and am trying to fit a prediction model using both quantitative and categorical variables. I have adjusted the dataset as much as possible, but still have one variable (which is important in the analysis) with 19 missing cases. What would you say is the best approach/program to use to replace the missing values/instead of deletion? Would the EM estimator from SPSS provide good enough replacement? Seeing that I have important categorical predictors that will be used in the analysis, I understand that I can't use them in Amos. What other programs could be suited for this type of model?