condition mean min max ZT0-3 111.80000000000001 111.80000000000001 111.80000000000001 ZT4-7 138.0 138.0 138.0 ZT8-11 152.6 152.6 152.6 ZT12-15 117.25 117.25 117.25 ZT16-19 126.0 126.0 126.0 ZT20-23 97.05000000000001 97.05000000000001 97.05000000000001