condition mean min max ZT0-3 1.6816300000000002 1.679 1.68426 ZT4-7 1.65763 1.65763 1.65763 ZT8-11 5.13425 5.13425 5.13425 ZT12-15 0 0 0 ZT16-19 9.92032 9.92032 9.92032 ZT20-23 8.307065000000001 8.307065000000001 8.307065000000001