condition mean min max ZT0-3 29.05 29.05 29.05 ZT4-7 50.5 50.5 50.5 ZT8-11 44.25 44.25 44.25 ZT12-15 28.45 28.45 28.45 ZT16-19 91.0 91.0 91.0 ZT20-23 58.65 58.65 58.65