condition mean min max ZT0-3 62.75615 58.619299999999996 66.893 ZT4-7 31.247149999999998 31.247149999999998 31.247149999999998 ZT8-11 46.0685 46.0685 46.0685 ZT12-15 0 0 0 ZT16-19 57.964749999999995 57.964749999999995 57.964749999999995 ZT20-23 49.6902 49.6902 49.6902