condition mean min max ZT0-3 70.10187 70.10187 70.10187 ZT4-7 150.547878 150.547878 150.547878 ZT8-11 301.24433550000003 301.24433550000003 301.24433550000003 ZT12-15 174.9390645 174.9390645 174.9390645 ZT16-19 95.745697 95.745697 95.745697 ZT20-23 108.8233665 108.8233665 108.8233665