condition mean min max ZT0-3 63.033924999999996 62.24525 63.822599999999994 ZT4-7 46.56355 46.56355 46.56355 ZT8-11 34.84065 34.84065 34.84065 ZT12-15 0 0 0 ZT16-19 45.57685 45.57685 45.57685 ZT20-23 55.33005 55.33005 55.33005