condition mean min max ZT0-3 786.25 786.25 786.25 ZT4-7 889.2 889.2 889.2 ZT8-11 797.5 797.5 797.5 ZT12-15 773.4 773.4 773.4 ZT16-19 789.95 789.95 789.95 ZT20-23 722.25 722.25 722.25