condition mean min max ZT0-3 83.35 83.35 83.35 ZT4-7 55.8 55.8 55.8 ZT8-11 58.2 58.2 58.2 ZT12-15 42.65 42.65 42.65 ZT16-19 73.75 73.75 73.75 ZT20-23 46.55 46.55 46.55