condition mean min max ZT0-3 64.85 64.85 64.85 ZT4-7 57.5 57.5 57.5 ZT8-11 40.45 40.45 40.45 ZT12-15 67.3 67.3 67.3 ZT16-19 55.95 55.95 55.95 ZT20-23 67.6 67.6 67.6