condition mean min max ZT0-3 82.75 82.75 82.75 ZT4-7 63.0 63.0 63.0 ZT8-11 65.85 65.85 65.85 ZT12-15 55.15 55.15 55.15 ZT16-19 68.2 68.2 68.2 ZT20-23 57.25 57.25 57.25