condition mean min max ZT0-3 0.8547483333333333 0.8547483333333333 0.8547483333333333 ZT4-7 0.20057550000000002 0.20057550000000002 0.20057550000000002 ZT8-11 0.8613980000000001 0.8613980000000001 0.8613980000000001 ZT12-15 0.42410950000000003 0.42410950000000003 0.42410950000000003 ZT16-19 1.1460080000000001 1.1460080000000001 1.1460080000000001 ZT20-23 0.658589 0.658589 0.658589