condition mean min max ZT0-3 4.8947875 4.438595 5.35098 ZT4-7 1.88464 1.88464 1.88464 ZT8-11 1.06077 1.06077 1.06077 ZT12-15 0 0 0 ZT16-19 3.0504 3.0504 3.0504 ZT20-23 2.601285 2.601285 2.601285