condition mean min max ZT0-3 46.92875 46.92875 46.92875 ZT4-7 63.480450000000005 63.480450000000005 63.480450000000005 ZT8-11 35.94845 35.94845 35.94845 ZT12-15 30.306150000000002 30.306150000000002 30.306150000000002 ZT16-19 26.771050000000002 26.771050000000002 26.771050000000002 ZT20-23 29.46995 29.46995 29.46995