condition mean min max ZT0-3 71.35 71.35 71.35 ZT4-7 48.9 48.9 48.9 ZT8-11 51.35 51.35 51.35 ZT12-15 60.95 60.95 60.95 ZT16-19 78.75 78.75 78.75 ZT20-23 58.5 58.5 58.5