condition mean min max ZT0-3 24.8435 24.8435 24.8435 ZT4-7 22.609250000000003 22.609250000000003 22.609250000000003 ZT8-11 17.61955 17.61955 17.61955 ZT12-15 13.5427 13.5427 13.5427 ZT16-19 16.221266666666665 16.221266666666665 16.221266666666665 ZT20-23 18.427599999999998 18.427599999999998 18.427599999999998