I've picked another England batsman at random: Jos Buttler:
Runs: 1474
Innings: 47
Average: 36.85
Removing the outliers and averaging the middle 85% of his test innings
Runs: 1474
Average: 36.85
Runs: 1114
Average: 33.76
His average goes down by 13% because his average isn't beefed...
I see after the one innings of any substance early on in this series, Jennings has quickly settled back into mediocrity - just the 13 runs today then.
He averages under 28 in test matches (27 innings). If you took away his top two and bottom two scores to get an idea of the level of...