condition mean min max ZT0-3 1.9876949999999998 1.6780599999999999 2.2973299999999997 ZT4-7 2.3234649999999997 2.3234649999999997 2.3234649999999997 ZT8-11 4.32977 4.32977 4.32977 ZT12-15 0 0 0 ZT16-19 4.205175 4.205175 4.205175 ZT20-23 3.0990200000000003 3.0990200000000003 3.0990200000000003