condition mean min max ZT0-3 0.36020065525 0.322656376 0.39774493450000004 ZT4-7 0.66880392275 0.46083931199999995 0.8767685335 ZT8-11 0.8586153242500001 0.376156523 1.3410741255 ZT12-15 0.6935921277499999 0.635734092 0.7514501634999999 ZT16-19 0.91039241075 0.767022646 1.0537621755 ZT20-23 1.4151555815 0.9061920255 1.9241191375