condition mean min max ZT0-3 115.01533333333333 113.23949999999999 117.582 ZT4-7 81.70875000000001 81.70875000000001 81.70875000000001 ZT8-11 65.57655 65.57655 65.57655 ZT12-15 69.31855 62.995850000000004 75.64125 ZT16-19 73.1722 73.1722 73.1722 ZT20-23 104.26400000000001 104.26400000000001 104.26400000000001