condition mean min max ZT0-3 5131.249692 5131.249692 5131.249692 ZT4-7 5840.159011 5840.159011 5840.159011 ZT8-11 6325.533205 6325.533205 6325.533205 ZT12-15 6950.880979 6950.880979 6950.880979 ZT16-19 2237.148779 2237.148779 2237.148779 ZT20-23 1627.1429070000002 1627.1429070000002 1627.1429070000002