condition mean min max ZT0-3 59.63805000000001 52.59905 66.67705000000001 ZT4-7 26.4897 26.4897 26.4897 ZT8-11 33.83695 33.83695 33.83695 ZT12-15 0 0 0 ZT16-19 37.198 37.198 37.198 ZT20-23 37.704 37.704 37.704