condition mean min max ZT0-3 38.4174 38.4174 38.4174 ZT4-7 55.79545 55.79545 55.79545 ZT8-11 58.954 58.954 58.954 ZT12-15 53.48285 53.48285 53.48285 ZT16-19 44.26865 44.26865 44.26865 ZT20-23 34.3379 34.3379 34.3379