condition mean min max ZT0-3 22.980917 22.980917 22.980917 ZT4-7 168.67592100000002 168.67592100000002 168.67592100000002 ZT8-11 103.660155 103.660155 103.660155 ZT12-15 26.210319 26.210319 26.210319 ZT16-19 19.5808915 19.5808915 19.5808915 ZT20-23 16.428062 16.428062 16.428062