Where are explanations for match statistics?

Sorry if it is an obvious place, but I've searched unsuccessfully. How are match statistics calculated from the FMS and what do they mean? In the phone apps - how are predictions made? Are the app stats the same as from the FRC site, or is something else done for them?

I think get rank and win loss record, assists, auto, teleop, but what is T & C and how is QS determined?