condition mean min max ZT0-3 60.3574 52.66715 68.04765 ZT4-7 36.19975 36.19975 36.19975 ZT8-11 32.50085 32.50085 32.50085 ZT12-15 0 0 0 ZT16-19 68.92375 68.92375 68.92375 ZT20-23 60.233850000000004 60.233850000000004 60.233850000000004