condition mean min max ZT0-3 24.5068 24.5068 24.5068 ZT4-7 11.01539 11.01539 11.01539 ZT8-11 14.97455 14.97455 14.97455 ZT12-15 18.722949999999997 18.722949999999997 18.722949999999997 ZT16-19 47.3228 47.3228 47.3228 ZT20-23 34.05745 34.05745 34.05745