condition mean min max ZT0-3 62.3 62.3 62.3 ZT4-7 22.9 22.9 22.9 ZT8-11 39.85 39.85 39.85 ZT12-15 74.4 74.4 74.4 ZT16-19 66.1 66.1 66.1 ZT20-23 82.4 82.4 82.4