condition mean min max ZT0-3 1068.001288 1068.001288 1068.001288 ZT4-7 998.7608089999999 998.7608089999999 998.7608089999999 ZT8-11 815.2000820000001 815.2000820000001 815.2000820000001 ZT12-15 860.0247975 860.0247975 860.0247975 ZT16-19 830.4244295 830.4244295 830.4244295 ZT20-23 721.5866100000001 721.5866100000001 721.5866100000001