condition mean min max ZT0-3 105.899026 105.899026 105.899026 ZT4-7 76.3012495 76.3012495 76.3012495 ZT8-11 87.543864 87.543864 87.543864 ZT12-15 119.80413949999999 119.80413949999999 119.80413949999999 ZT16-19 193.95001299999998 193.95001299999998 193.95001299999998 ZT20-23 214.309233 214.309233 214.309233