The goal of the prediction methodology is to design a
model that can infer characteristic of predicted class from
combination of other data [20]. The task of data mining in
this research is to build models for prediction of the class
based on selected attributes. The research applies the
following algorithms: J48, Bayes Net, and Naive Bayes,
Simple Cart, and REPTREE algorithm to classify and
develop a model to diagnose heart attacks in the patient data
set from medical practitioners.