condition mean min max ZT0-3 0.28556233333333336 0.28556233333333336 0.28556233333333336 ZT4-7 0.7153780000000001 0.7153780000000001 0.7153780000000001 ZT8-11 0.328584 0.328584 0.328584 ZT12-15 0.7380855 0.7380855 0.7380855 ZT16-19 0.838473 0.838473 0.838473 ZT20-23 0.513735 0.513735 0.513735