If I was asked to explain it, I would start by researching whether people who own Teslas might be safer drivers than average when they weren't in Teslas. Or whether, by virtue of other characteristics of the car, like handling, acceleration, and breaking, Teslas may be safer in general, regardless of their dashboards. I'd also question the source of the data and the methodology by which it was collected, just to be diligent. I wouldn't just start by assuming that having a touch screen made cars safer, though.