Mostly predictive statistics (aka machine learning).

Download the app:

• https://itunes.apple.com/us/app/stack-exchange/id871299723

With regard to the fine art of asking a question, please keep in mind:

• KISS = BLUF + TLDR.™
• Take the tour: https://stats.stackexchange.com/tour
• Read: https://stats.stackexchange.com/help/how-to-ask
• Read: https://meta.stackoverflow.com/editing-help
• Read: https://math.meta.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference