condition mean min max ZT0-3 25.43805 22.299149999999997 27.9809 ZT4-7 19.22495 19.22495 19.22495 ZT8-11 24.195149999999998 24.195149999999998 24.195149999999998 ZT12-15 38.81465 36.592600000000004 41.036699999999996 ZT16-19 33.99615 33.99615 33.99615 ZT20-23 35.0766 35.0766 35.0766