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msandford | 4 months ago
Everyone thinks they're above average, even people who know statistics! So if it's merely 20% better than the average driver a huge number of people will conclude "I am above average so I'll do a better job"
Will some of them be wrong? Of course. But tons of them will be right, too.
It can't be statistically significantly better, it has to be statistically overwhelmingly better. Not a part of a standard deviation but several of them.
sowbug|4 months ago
bluGill|4 months ago
steveBK123|4 months ago
If you aren’t in one of those categories you are immediately dramatically better than average. This is fairly easy to do before even considering being a “good driver” / defensive driver / etc.
So you want a better comparison for most people.