condition mean min max ZT0-3 65.16155 65.16155 65.16155 ZT4-7 50.433800000000005 50.433800000000005 50.433800000000005 ZT8-11 54.495400000000004 54.495400000000004 54.495400000000004 ZT12-15 48.06995 48.06995 48.06995 ZT16-19 65.54055 65.54055 65.54055 ZT20-23 69.50585000000001 69.50585000000001 69.50585000000001