"There's several reasons
1. You've intervened in the process. For example when you build a model for a retention campaign you've selected the customers most likely to leave and made them an offer to stay. Therefor you've created…"
"I agree with both points. Especially with your remarks above about 'millions of cases' in mind. But even in that case it might make sense to use 'statistical techniques' like modelling on different samples because the response to…"
"The difference in response you mention (1.2 vs 0.9) could be a fluke of random events and you'd be gambling you're company's money and in stead of . Statistics will give you more confidence in making your decision. If you have to…"
"Predictive Analytics is used in a wider range of applications besides marketing. The key to PA is the cross over from different business processes f.e. using credit & fraud models in marketing applicatons as well. If you look at the original…"
Mostly files like this are handled in a client-server architecture. There's a white paper with recommendations for the server software "PASW Statistics Base Server: New hardware recommendations"…"
The speed with which SPSS opens the text data depends on the speed of your hard drive end the i/o speed of your computer. Default SPSS will cache the data that you read. You can switch that off by unchecking "Cache data locally" when…"
"PASW Modeler (formerly known as SPSS Clementine) does not store data in RAM (except for the data needed at any step in an algorithm). I'm not dure about the other products. PASW Modeler uses SQL optimization to have maximum benefits from the…"