condition mean min max ZT0-3 187.5 187.5 187.5 ZT4-7 227.9 227.9 227.9 ZT8-11 638.3 638.3 638.3 ZT12-15 1294.3000000000002 1294.3000000000002 1294.3000000000002 ZT16-19 1084.5 1084.5 1084.5 ZT20-23 345.95000000000005 345.95000000000005 345.95000000000005