condition mean min max ZT0-3 1043.4499999999998 1043.4499999999998 1043.4499999999998 ZT4-7 852.0 852.0 852.0 ZT8-11 909.25 909.25 909.25 ZT12-15 839.4000000000001 839.4000000000001 839.4000000000001 ZT16-19 1044.6 1044.6 1044.6 ZT20-23 1126.8000000000002 1126.8000000000002 1126.8000000000002