Originally Posted by Uppercut
Resisting the temptation to dig into Statsguru, I'd suggest that a 'good' first innings total (not the same as a par score) at a top-level ODI (i.e. between two test-playing nations) is closer to 280. The batting powerplay in particular has seen a massive upsurge in 300+ scores.
Varies heavily based on conditions though, obvz.
From 2001 to today, teams batting first and scoring 250-260 have won 64 out of 99 matches.
Between 240-250 it's 48 out of 103.
From 2007 to today, the stats are 11 out of 35 for 240-250, and 21 out of 35 for 250-260.
280+ has won 128 out of 154 games since 2007 - not really the number I'm looking for. I stand by my number!
In all T20Is, 160-170 has won 5 out 16, and 170-180 has won 8 out of 9: in fact 170+ has only lost three times as a target. So we're definitely looking in the same range of figures - a far smaller reduction in the par score than in the number of overs.