condition mean min max ZT0-3 10.141265 10.141265 10.141265 ZT4-7 10.982311 10.982311 10.982311 ZT8-11 10.0770285 10.0770285 10.0770285 ZT12-15 8.879019 8.879019 8.879019 ZT16-19 10.160813999999998 10.160813999999998 10.160813999999998 ZT20-23 10.0114475 10.0114475 10.0114475