condition mean min max ZT0-3 298.507 232.4835 365.41949999999997 ZT4-7 106.07785 106.07785 106.07785 ZT8-11 7.098414999999999 7.098414999999999 7.098414999999999 ZT12-15 5.274862499999999 4.168975 6.38075 ZT16-19 6.60236 6.60236 6.60236 ZT20-23 26.4672 26.4672 26.4672