> First off, by definition like 49% of the drivers are technically better than the "average driver".
No, that’s not the definition of mean, that’s (something like) the definition of median.
In a skewed distribution (which driving skill may very well be), the mean can be very far from the middle. If a relatively small number of people are extraordinarily bad at driving, most people are above average. If a relatively small number of people are extraordinarily good at driving, most people are below average.
Why this nitpick matters: if the leading point of your thesis depends on is quantifying how many people are above average, you should really know if the average is at the 10th, 50th or 90th percentiles (or somewhere else entirely).
No, that’s not the definition of mean, that’s (something like) the definition of median.
In a skewed distribution (which driving skill may very well be), the mean can be very far from the middle. If a relatively small number of people are extraordinarily bad at driving, most people are above average. If a relatively small number of people are extraordinarily good at driving, most people are below average.
Why this nitpick matters: if the leading point of your thesis depends on is quantifying how many people are above average, you should really know if the average is at the 10th, 50th or 90th percentiles (or somewhere else entirely).