condition mean min max ZT0-3 41.8 41.8 41.8 ZT4-7 53.1 53.1 53.1 ZT8-11 66.65 66.65 66.65 ZT12-15 52.85 52.85 52.85 ZT16-19 44.8 44.8 44.8 ZT20-23 44.75 44.75 44.75