condition mean min max ZT0-3 10.147296 10.147296 10.147296 ZT4-7 10.382105 10.382105 10.382105 ZT8-11 9.070100499999999 9.070100499999999 9.070100499999999 ZT12-15 8.455448 8.455448 8.455448 ZT16-19 8.345201 8.345201 8.345201 ZT20-23 8.5219905 8.5219905 8.5219905