condition mean min max ZT0-3 61.3 61.3 61.3 ZT4-7 85.2 85.2 85.2 ZT8-11 60.85 60.85 60.85 ZT12-15 63.7 63.7 63.7 ZT16-19 71.1 71.1 71.1 ZT20-23 67.1 67.1 67.1