condition mean min max ZT0-3 1.8227799999999998 1.8227799999999998 1.8227799999999998 ZT4-7 0.8216025 0.8216025 0.8216025 ZT8-11 0.7278655 0.7278655 0.7278655 ZT12-15 1.41837 1.41837 1.41837 ZT16-19 4.038575 4.038575 4.038575 ZT20-23 2.4711499999999997 2.4711499999999997 2.4711499999999997