condition mean min max ZT0-3 1232.95 1232.95 1232.95 ZT4-7 629.7 629.7 629.7 ZT8-11 870.0999999999999 870.0999999999999 870.0999999999999 ZT12-15 780.55 780.55 780.55 ZT16-19 1349.75 1349.75 1349.75 ZT20-23 1490.5500000000002 1490.5500000000002 1490.5500000000002