Hello @ali_haidri - welcome to the user community. I'm happy to hear you using "Data Mining for the Masses" by Dr. North. It is an excellent text. Four years ago I did the exact same thing you did - taught myself RapidMiner by starting at page 1 and just moving through.
As for help with your decision trees, you have come to the right place. However you need to help us before we can help you. Please copy your XML process into a reply to this thread using the </> button and whatever data sets you are using. It is only in this way that we can "see what you are doing" and help.
Hi Thank you for response yes I will give you the chpt files as well as the actual data set.
there are two data set, set training and set scoring. I have already attached set training on previous reply. Here I am attaching test scoring.
Hello @ali_haidri - ok that's a good start. And can you please post your process XML?