condition mean min max ZT0-3 553.25 553.25 553.25 ZT4-7 497.6 497.6 497.6 ZT8-11 562.75 562.75 562.75 ZT12-15 573.0 573.0 573.0 ZT16-19 619.8 619.8 619.8 ZT20-23 600.6 600.6 600.6