condition mean min max ZT0-3 13.714095 8.843440000000001 18.58475 ZT4-7 16.054949999999998 16.054949999999998 16.054949999999998 ZT8-11 14.655619999999999 14.655619999999999 14.655619999999999 ZT12-15 0 0 0 ZT16-19 33.85195 33.85195 33.85195 ZT20-23 7.1799 7.1799 7.1799