You gain the ability to test for different slopes or intercepts in the populations, and more degrees of freedom are available for the analysis. Regression with qualitative variables is different from ...

There's more to a piece of paper than meets the eye - and paper analysis can find it. This specialized investigative process extracts historical and physical evidence from documents, photographs ...

There's more to a piece of paper than meets the eye - and paper analysis can find it. This specialized investigative process extracts historical and physical evidence from documents, photographs ...