condition mean min max ZT0-3 1.3930850000000001 1.29651 1.48966 ZT4-7 1.0249890000000001 1.0249890000000001 1.0249890000000001 ZT8-11 2.5450850000000003 2.5450850000000003 2.5450850000000003 ZT12-15 0 0 0 ZT16-19 2.32085 2.32085 2.32085 ZT20-23 1.415695 1.415695 1.415695