condition mean min max ZT0-3 1.5385749999999998 1.41909 1.6580599999999999 ZT4-7 1.182075 1.182075 1.182075 ZT8-11 1.31738 1.31738 1.31738 ZT12-15 0 0 0 ZT16-19 2.27123 2.27123 2.27123 ZT20-23 2.6728199999999998 2.6728199999999998 2.6728199999999998