condition mean min max ZT0-3 0.3689883333333333 0.2100115 0.5432815 ZT4-7 0.0 0.0 0.0 ZT8-11 0.2160635 0.2160635 0.2160635 ZT12-15 1.4720095 1.275289 1.66873 ZT16-19 0.41133149999999996 0.41133149999999996 0.41133149999999996 ZT20-23 1.38782 1.38782 1.38782