condition mean min max ZT0-3 147.0 147.0 147.0 ZT4-7 136.3 136.3 136.3 ZT8-11 109.1 109.1 109.1 ZT12-15 121.10000000000001 121.10000000000001 121.10000000000001 ZT16-19 158.45 158.45 158.45 ZT20-23 138.35 138.35 138.35