condition mean min max ZT0-3 83.326819 83.326819 83.326819 ZT4-7 82.5160955 82.5160955 82.5160955 ZT8-11 96.79357350000001 96.79357350000001 96.79357350000001 ZT12-15 81.6662875 81.6662875 81.6662875 ZT16-19 100.359525 100.359525 100.359525 ZT20-23 103.76745 103.76745 103.76745