06-09-2015 04:32 PM
I'm currently going through the Applied Analytics with EMiner course and am on the stepwise regression portion.
When I alter the default settings for the entry and stay significance level I get very different results than the demo. When I ran the regression with the default, my results matched those produced by the demo. Tried to attached a word file with print screen, but this wasn't allowed.
Message was edited by: Anna Brown Message was edited by: Anna Brown Welcome to the community, JASilver! I'm omitting your email address in your question for security reasons. You're in good hands here on the Data Mining Community - bunches of SAS Enterprise Miner experts are here to help and will respond on the community thread. Maybe you can try to save the printed screen image separately and upload it as an image into the message? Anna
06-10-2015 09:07 AM
Inserting pictures. Here's the demonstration (left side of the picture). Right side of the picture is what I get when I change the entry and stay significance levels from the default using the PVA97NK dataset.
For some reason I can't get the pictures of the demo (correct results to paste in this message. I'll try another message (nothing is simple).
06-10-2015 09:12 AM
I cant' get pictures of the demo results to upload for some reason. They look like the legitimate results a stepwise regression (versus the results I generated). Thanks!
06-12-2015 01:34 PM
How much did you change the significance level?
From your plot it looks like only 1 variable stays in your regression model. I doubt it is a good answer.
What happens when you use a Model Comparison node to compare the suggested settings of the book vs your tweaked regression? Which model is better?
06-12-2015 01:41 PM
It is my understanding that when you start the training, there is a Learning Path, where you choose your version of Enterprise Miner. The instructions and demos that you get will then show demos and solutions that were run in THAT version of EM. So, for example, if you are watching the EM 6 training lectures and demos, but using EM 13, it was my understanding that you might get different results than the exercise or practice solutions. I don't know whether this is what you are running into. Did you follow the Learning Path instructions to select your version and did you also perform the required setup steps to get the data that was delivered with this version of the training? We do sometimes get these questions at firstname.lastname@example.org where someone reports that they are getting different results than what is shown in the course and although it has (rarely) been an error in the course, most often when we track it down, the student is watching the lectures for a different version of EM than the one in which they are performing the practices. So they are "out of sync" and need to switch the course to their version of EM (or the closest version...for example, if you have EM 13, you would watch the EM 12 training lectures/exercises).