condition mean min max ZT0-3 0.41342217625 0.18088312 0.6459612324999999 ZT4-7 4.70448948575 3.8027881825 5.606190789 ZT8-11 7.268406672499999 5.876833488 8.659979857 ZT12-15 14.8355261055 14.670972436 15.000079775 ZT16-19 15.635254442499999 15.43360667 15.836902214999999 ZT20-23 10.73271316775 10.3506284725 11.114797863