condition mean min max ZT0-3 61.769823 61.769823 61.769823 ZT4-7 202.5424355 202.5424355 202.5424355 ZT8-11 260.519162 260.519162 260.519162 ZT12-15 113.35885350000001 113.35885350000001 113.35885350000001 ZT16-19 92.2276835 92.2276835 92.2276835 ZT20-23 81.053699 81.053699 81.053699