condition mean min max ZT0-3 36.65 36.65 36.65 ZT4-7 36.5 36.5 36.5 ZT8-11 53.3 53.3 53.3 ZT12-15 43.45 43.45 43.45 ZT16-19 67.0 67.0 67.0 ZT20-23 37.5 37.5 37.5