condition mean min max ZT0-3 101.44999999999999 101.44999999999999 101.44999999999999 ZT4-7 60.9 60.9 60.9 ZT8-11 63.95 63.95 63.95 ZT12-15 63.550000000000004 63.550000000000004 63.550000000000004 ZT16-19 68.69999999999999 68.69999999999999 68.69999999999999 ZT20-23 96.8 96.8 96.8