condition mean min max ZT0-3 65.65 65.65 65.65 ZT4-7 57.0 57.0 57.0 ZT8-11 32.8 32.8 32.8 ZT12-15 60.2 60.2 60.2 ZT16-19 67.05 67.05 67.05 ZT20-23 85.1 85.1 85.1