condition mean min max ZT0-3 0.0270601 0.02701935 0.02710085 ZT4-7 0.160834 0.160834 0.160834 ZT8-11 0.08173949999999999 0.08173949999999999 0.08173949999999999 ZT12-15 0 0 0 ZT16-19 0.0266413 0.0266413 0.0266413 ZT20-23 0.0532215 0.0532215 0.0532215