condition mean min max ZT0-3 1.15679225 1.1097955 1.203789 ZT4-7 1.334805 1.334805 1.334805 ZT8-11 1.3661475 1.3661475 1.3661475 ZT12-15 0 0 0 ZT16-19 3.81094 3.81094 3.81094 ZT20-23 2.0685700000000002 2.0685700000000002 2.0685700000000002