condition mean min max ZT0-3 36.90025 36.90025 36.90025 ZT4-7 21.02995 21.02995 21.02995 ZT8-11 12.932945 12.932945 12.932945 ZT12-15 32.5549 32.5549 32.5549 ZT16-19 41.654399999999995 41.654399999999995 41.654399999999995 ZT20-23 45.11865 45.11865 45.11865