Summary of Results:
Ordered by accuracy and then simplicity, decending

Test Result
Descretized 84.27
Normalized - Descretized 84.27
Descretized (Complex Weka) 84.27
Normalized - Descretized (Complex Weka) 84.27
Default 82.9924
Normalized 82.9924
Normalized (Complex Weka) 82.974
Short (500 train, 500 test) 82.8343
No missing attributes 82.4104
Complex Naive Bayes (Weka) 83.0047