condition mean min max ZT0-3 175.853345 175.853345 175.853345 ZT4-7 117.8894635 117.8894635 117.8894635 ZT8-11 121.840124 121.840124 121.840124 ZT12-15 168.948373 168.948373 168.948373 ZT16-19 194.2242845 194.2242845 194.2242845 ZT20-23 221.92535900000001 221.92535900000001 221.92535900000001