condition mean min max ZT0-3 49.7 49.7 49.7 ZT4-7 70.0 70.0 70.0 ZT8-11 77.44999999999999 77.44999999999999 77.44999999999999 ZT12-15 129.6 129.6 129.6 ZT16-19 83.8 83.8 83.8 ZT20-23 54.95 54.95 54.95