condition mean min max ZT0-3 3.6510175 1.9395950000000002 5.362439999999999 ZT4-7 7.9829799999999995 7.9829799999999995 7.9829799999999995 ZT8-11 14.5936 14.5936 14.5936 ZT12-15 0 0 0 ZT16-19 10.014885 10.014885 10.014885 ZT20-23 6.9461949999999995 6.9461949999999995 6.9461949999999995