STATS MAKE ME CRY

Dear Siladitya,

Unfortunately, I'm not familiar with Statistica as a software platform. However, that type of error message in most programs would usually indicate that you have too much missing data on the items that you are using for the analysis. A "valid case" in most statistical software platforms is typically a case with a specified amount of non-missing data (if the analysis is using listwise deletion, then a valid case is one with no missing data; if the analysis allows for some missing data, such as pairwise deletion or MLE, then a valid case is likely one that isn't missing all values for the variables). It is most likely that Statistica is considering valid cases as not missing any data for the key variables in this case, but I can't say for sure without knowledge of the program.

Here are a few resources from the web on Statistica, though they seem very basic in nature:

StatSoft Video Tutorials for Statistica:
http://www.statsoft.com/support/download/video-tutorials/

U of Toronto Brief Tutorial:
http://www.psych.utoronto.ca/courses/c1/statistica/page1.htm

Siladitya,

I wasn't referring to values of zero, but missing values. With that said, I can't be sure that is the problem, since I'm not familiar with Statistica. Sorry. I hope the resources I provided are helpful.