condition mean min max ZT0-3 13.145800000000001 12.25655 14.03505 ZT4-7 9.680765000000001 9.680765000000001 9.680765000000001 ZT8-11 23.88655 23.88655 23.88655 ZT12-15 0 0 0 ZT16-19 38.30615 38.30615 38.30615 ZT20-23 24.8059 24.8059 24.8059