condition mean min max ZT0-3 164.733178 164.733178 164.733178 ZT4-7 117.87130300000001 117.87130300000001 117.87130300000001 ZT8-11 33.4183805 33.4183805 33.4183805 ZT12-15 87.4867725 87.4867725 87.4867725 ZT16-19 28.282282 28.282282 28.282282 ZT20-23 29.5400365 29.5400365 29.5400365