condition mean min max ZT0-3 62.45 62.45 62.45 ZT4-7 33.7 33.7 33.7 ZT8-11 61.2 61.2 61.2 ZT12-15 67.0 67.0 67.0 ZT16-19 73.6 73.6 73.6 ZT20-23 89.45 89.45 89.45