Dr. James McCaffrey presents a complete end-to-end demonstration of linear regression with two-way interactions between predictor variables. Standard linear regression predicts a single numeric value ...

Brazil's betting operators have been told to check a database of welfare claimants to ensure financially vulnerable people are not gambling.

I tested Claude 4.5 against ChatGPT-5 in 9 challenges from logic puzzles to storytelling. Here’s which AI won.