condition mean min max ZT0-3 71.65 71.65 71.65 ZT4-7 71.0 71.0 71.0 ZT8-11 78.6 78.6 78.6 ZT12-15 84.9 84.9 84.9 ZT16-19 63.4 63.4 63.4 ZT20-23 41.75 41.75 41.75