condition mean min max ZT0-3 33.05 33.05 33.05 ZT4-7 146.0 146.0 146.0 ZT8-11 176.85 176.85 176.85 ZT12-15 106.9 106.9 106.9 ZT16-19 16.05 16.05 16.05 ZT20-23 8.4 8.4 8.4