condition mean min max ZT0-3 36.35 36.35 36.35 ZT4-7 52.4 52.4 52.4 ZT8-11 55.45 55.45 55.45 ZT12-15 29.75 29.75 29.75 ZT16-19 49.2 49.2 49.2 ZT20-23 47.6 47.6 47.6