condition mean min max ZT0-3 0.020531283333333334 0.0 0.03082425 ZT4-7 0.0 0.0 0.0 ZT8-11 0.2218345 0.2218345 0.2218345 ZT12-15 0.08712575 0.0688825 0.105369 ZT16-19 0.02957355 0.02957355 0.02957355 ZT20-23 0.03337515 0.03337515 0.03337515