condition mean min max ZT0-3 69.85 69.85 69.85 ZT4-7 120.0 120.0 120.0 ZT8-11 159.65 159.65 159.65 ZT12-15 124.25 124.25 124.25 ZT16-19 60.95 60.95 60.95 ZT20-23 70.6 70.6 70.6