condition mean min max ZT0-3 826.8499999999999 826.8499999999999 826.8499999999999 ZT4-7 1007.4 1007.4 1007.4 ZT8-11 1068.3 1068.3 1068.3 ZT12-15 1114.1999999999998 1114.1999999999998 1114.1999999999998 ZT16-19 1202.5500000000002 1202.5500000000002 1202.5500000000002 ZT20-23 1020.45 1020.45 1020.45