condition mean min max ZT0-3 61.56189 61.56189 61.56189 ZT4-7 73.399487 73.399487 73.399487 ZT8-11 82.466853 82.466853 82.466853 ZT12-15 77.72307649999999 77.72307649999999 77.72307649999999 ZT16-19 87.747759 87.747759 87.747759 ZT20-23 78.09344899999999 78.09344899999999 78.09344899999999