condition mean min max ZT0-3 118.796314 118.796314 118.796314 ZT4-7 126.115897 126.115897 126.115897 ZT8-11 135.526045 135.526045 135.526045 ZT12-15 114.935131 114.935131 114.935131 ZT16-19 147.6121545 147.6121545 147.6121545 ZT20-23 137.51014800000002 137.51014800000002 137.51014800000002