condition mean min max ZT0-3 0.12078406575 0.06664819150000001 0.17491994 ZT4-7 0.038780249249999996 0.0 0.07756049849999999 ZT8-11 0.8626539365000001 0.6474662430000001 1.07784163 ZT12-15 2.2846798342500003 1.8056956175 2.763664051 ZT16-19 2.410530269 1.9978819405000001 2.8231785975 ZT20-23 2.01526499475 2.0058235125 2.024706477