condition mean min max ZT0-3 162.55 162.55 162.55 ZT4-7 460.2 460.2 460.2 ZT8-11 301.5 301.5 301.5 ZT12-15 168.8 168.8 168.8 ZT16-19 91.55000000000001 91.55000000000001 91.55000000000001 ZT20-23 105.35000000000001 105.35000000000001 105.35000000000001