condition mean min max ZT0-3 122.693595 122.693595 122.693595 ZT4-7 88.47757899999999 88.47757899999999 88.47757899999999 ZT8-11 102.4582 102.4582 102.4582 ZT12-15 93.12120150000001 93.12120150000001 93.12120150000001 ZT16-19 84.408174 84.408174 84.408174 ZT20-23 71.9395875 71.9395875 71.9395875