condition mean min max ZT0-3 632.139125 632.139125 632.139125 ZT4-7 442.25075649999997 442.25075649999997 442.25075649999997 ZT8-11 484.884088 484.884088 484.884088 ZT12-15 499.06188399999996 499.06188399999996 499.06188399999996 ZT16-19 691.7639919999999 691.7639919999999 691.7639919999999 ZT20-23 699.6156289999999 699.6156289999999 699.6156289999999