condition mean min max ZT0-3 27.8214 27.8214 27.8214 ZT4-7 23.242449999999998 23.242449999999998 23.242449999999998 ZT8-11 24.9976 24.9976 24.9976 ZT12-15 24.5583 24.5583 24.5583 ZT16-19 32.757549999999995 32.757549999999995 32.757549999999995 ZT20-23 29.1937 29.1937 29.1937