condition mean min max ZT0-3 0.31246599999999997 0.31246599999999997 0.31246599999999997 ZT4-7 0.2604311 0.2604311 0.2604311 ZT8-11 0.3946745 0.3946745 0.3946745 ZT12-15 0.083622 0.083622 0.083622 ZT16-19 1.143834 1.143834 1.143834 ZT20-23 0.9487899999999999 0.9487899999999999 0.9487899999999999