condition mean min max ZT0-3 62.88725 59.896950000000004 65.87755 ZT4-7 100.47895 100.47895 100.47895 ZT8-11 259.8735 259.8735 259.8735 ZT12-15 0 0 0 ZT16-19 209.189 209.189 209.189 ZT20-23 112.541 112.541 112.541