condition mean min max ZT0-3 0.3521575 0.3521575 0.3521575 ZT4-7 0.322186 0.322186 0.322186 ZT8-11 0.155597 0.155597 0.155597 ZT12-15 0.2189905 0.2189905 0.2189905 ZT16-19 0.20378000000000002 0.20378000000000002 0.20378000000000002 ZT20-23 0.279511 0.279511 0.279511