condition mean min max ZT0-3 1.24282175 1.1369535 1.34869 ZT4-7 1.1351635 1.1351635 1.1351635 ZT8-11 1.32078 1.32078 1.32078 ZT12-15 0 0 0 ZT16-19 2.10113 2.10113 2.10113 ZT20-23 1.976535 1.976535 1.976535