condition mean min max ZT0-3 0.6313016666666666 0.443835 0.728146 ZT4-7 1.0237595 1.0237595 1.0237595 ZT8-11 0.8164285 0.8164285 0.8164285 ZT12-15 4.93846 2.052745 7.824175 ZT16-19 3.822075 3.822075 3.822075 ZT20-23 1.5855899999999998 1.5855899999999998 1.5855899999999998