condition mean min max ZT0-3 284.15 284.15 284.15 ZT4-7 296.3 296.3 296.3 ZT8-11 497.05 497.05 497.05 ZT12-15 937.5 937.5 937.5 ZT16-19 777.5 777.5 777.5 ZT20-23 351.45 351.45 351.45