condition mean min max ZT0-3 2336.6000000000004 2336.6000000000004 2336.6000000000004 ZT4-7 2100.9 2100.9 2100.9 ZT8-11 2091.95 2091.95 2091.95 ZT12-15 1934.1999999999998 1934.1999999999998 1934.1999999999998 ZT16-19 2074.55 2074.55 2074.55 ZT20-23 2271.1000000000004 2271.1000000000004 2271.1000000000004