condition mean min max ZT0-3 970.924364 970.924364 970.924364 ZT4-7 997.9649165000001 997.9649165000001 997.9649165000001 ZT8-11 935.893054 935.893054 935.893054 ZT12-15 1002.0220065000001 1002.0220065000001 1002.0220065000001 ZT16-19 1168.9893735 1168.9893735 1168.9893735 ZT20-23 928.533055 928.533055 928.533055