condition mean min max ZT0-3 133.913 121.41 146.416 ZT4-7 67.08785 67.08785 67.08785 ZT8-11 46.97725 46.97725 46.97725 ZT12-15 0 0 0 ZT16-19 160.52300000000002 160.52300000000002 160.52300000000002 ZT20-23 141.628 141.628 141.628