condition mean min max ZT0-3 40.45 40.45 40.45 ZT4-7 36.3 36.3 36.3 ZT8-11 54.5 54.5 54.5 ZT12-15 73.75 73.75 73.75 ZT16-19 65.35 65.35 65.35 ZT20-23 32.55 32.55 32.55