condition mean min max ZT0-3 48.830799999999996 48.830799999999996 48.830799999999996 ZT4-7 38.603 38.603 38.603 ZT8-11 30.00685 30.00685 30.00685 ZT12-15 40.55995 40.55995 40.55995 ZT16-19 44.87935 44.87935 44.87935 ZT20-23 49.1174 49.1174 49.1174