condition mean min max ZT0-3 165.201819 165.201819 165.201819 ZT4-7 114.019311 114.019311 114.019311 ZT8-11 149.068098 149.068098 149.068098 ZT12-15 153.22626150000002 153.22626150000002 153.22626150000002 ZT16-19 186.088913 186.088913 186.088913 ZT20-23 168.42832750000002 168.42832750000002 168.42832750000002