condition mean min max ZT0-3 70.2 70.2 70.2 ZT4-7 36.3 36.3 36.3 ZT8-11 19.9 19.9 19.9 ZT12-15 67.0 67.0 67.0 ZT16-19 44.75 44.75 44.75 ZT20-23 79.94999999999999 79.94999999999999 79.94999999999999