condition mean min max ZT0-3 1696.302718 1696.302718 1696.302718 ZT4-7 1598.2620075 1598.2620075 1598.2620075 ZT8-11 906.020564 906.020564 906.020564 ZT12-15 1799.432799 1799.432799 1799.432799 ZT16-19 892.860203 892.860203 892.860203 ZT20-23 1793.4180285 1793.4180285 1793.4180285