condition mean min max ZT0-3 133.75 133.75 133.75 ZT4-7 116.1 116.1 116.1 ZT8-11 178.65 178.65 178.65 ZT12-15 173.5 173.5 173.5 ZT16-19 166.45 166.45 166.45 ZT20-23 115.35 115.35 115.35