condition mean min max ZT0-3 84.19999999999999 84.19999999999999 84.19999999999999 ZT4-7 51.9 51.9 51.9 ZT8-11 55.75 55.75 55.75 ZT12-15 70.1 70.1 70.1 ZT16-19 66.44999999999999 66.44999999999999 66.44999999999999 ZT20-23 93.95 93.95 93.95