condition mean min max ZT0-3 0.70570510625 0.548886709 0.8625235035000001 ZT4-7 0.64843505725 0.64123073 0.6556393845 ZT8-11 0.379343713 0.317876441 0.44081098500000004 ZT12-15 0.547328307 0.501239988 0.593416626 ZT16-19 0.9542564067499999 0.8159697100000001 1.0925431034999997 ZT20-23 1.7065481674999998 1.583414098 1.8296822369999997