condition mean min max ZT0-3 11.35 11.35 11.35 ZT4-7 44.3 44.3 44.3 ZT8-11 52.849999999999994 52.849999999999994 52.849999999999994 ZT12-15 36.85 36.85 36.85 ZT16-19 37.7 37.7 37.7 ZT20-23 36.3 36.3 36.3