condition mean min max ZT0-3 9.1925425 7.698885 10.6862 ZT4-7 13.4941 13.4941 13.4941 ZT8-11 3.378445 3.378445 3.378445 ZT12-15 0 0 0 ZT16-19 1.7205849999999998 1.7205849999999998 1.7205849999999998 ZT20-23 7.473599999999999 7.473599999999999 7.473599999999999