condition mean min max ZT0-3 66.04957068499999 58.04476946 74.05437191 ZT4-7 57.305251979999994 56.216661155 58.393842805 ZT8-11 28.9554384825 22.72535392 35.185523045 ZT12-15 9.242482886000001 8.8626083455 9.6223574265 ZT16-19 14.378606136 12.535536552 16.22167572 ZT20-23 20.825944030000002 19.18364538 22.46824268