condition mean min max ZT0-3 74.3 74.3 74.3 ZT4-7 68.1 68.1 68.1 ZT8-11 67.9 67.9 67.9 ZT12-15 84.9 84.9 84.9 ZT16-19 117.44999999999999 117.44999999999999 117.44999999999999 ZT20-23 97.45 97.45 97.45