condition mean min max ZT0-3 0.5660810000000001 0.4689535 0.6632085 ZT4-7 1.8269199999999999 1.8269199999999999 1.8269199999999999 ZT8-11 0.411907 0.411907 0.411907 ZT12-15 0 0 0 ZT16-19 2.13281 2.13281 2.13281 ZT20-23 1.44397 1.44397 1.44397