condition mean min max ZT0-3 0.015640166666666667 0.0 0.0469205 ZT4-7 0.0459929 0.0459929 0.0459929 ZT8-11 0.3872835 0.3872835 0.3872835 ZT12-15 0.28977320000000006 0.0483054 0.5312410000000001 ZT16-19 0.54116 0.54116 0.54116 ZT20-23 0.207337 0.207337 0.207337