condition mean min max ZT0-3 0.27655700000000005 0.1399415 0.41317250000000005 ZT4-7 0.28056499999999995 0.28056499999999995 0.28056499999999995 ZT8-11 0.5658065 0.5658065 0.5658065 ZT12-15 0 0 0 ZT16-19 0.6882885000000001 0.6882885000000001 0.6882885000000001 ZT20-23 0.0 0.0 0.0