condition mean min max ZT0-3 696.7 696.7 696.7 ZT4-7 816.8 816.8 816.8 ZT8-11 709.3499999999999 709.3499999999999 709.3499999999999 ZT12-15 1138.9 1138.9 1138.9 ZT16-19 990.25 990.25 990.25 ZT20-23 746.6 746.6 746.6