Test version of Pspp

Hello, When I go to download the most recent version of PSPP 1.5.3 from this URL below I am getting a “test version.” How do I get the real version and not the test version? https://caeis.etech.fh-augsburg.de/downloads/windows/1.5.3-g797d4c/pspp-64bit-install.exe Sent from my iPhone

Interaction term in PSPP

looking for how to do this in the PSPP manual but cannot find it. Ana Messler Sent from my iPhone