The Barcelona Grand Prix:
I have no idea what Norris has done to require that much scrutineering.
I mean, with an χ² of 3.23 it's not significant, but, with a standardised residual of 1.30, that's the largest deviation from expected we’ve seen all season. (The full series can be found here)
The other thing that interests me is that there was no random check on one of the top 10 finishers despite there being more than 15 cars officially classified as finishing, which throws off my theory that it's every second race if there are 15 or more finishers. However, finishers 15, 16 and 17 were only technically finishers, they stopped out on track but were classified as they completed more than 90% of the race distance. It's possible that race scrutineering treats those sort of finishers differently. The next time my theory can be tested will be the British Grand Prix.
The Season as a Whole:
The difference to expected is not statistically significant with an χ² of 2.39.
Hadjar being that undertested still confounds me given how well he's been doing. Unlike Alonso, Stroll and Albon, his results don’t obviously fit the “cars that don’t finish get fewer checks” pattern.
Hamilton, Russell, Norris and Verstappen being over-tested compared to expected makes sense, they've been doing well.
Antonelli only having been tested exactly as often as expected shows the effect of small numbers (there only having been 7 races so far).
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