condition mean min max ZT0-3 0.615785 0.615785 0.615785 ZT4-7 0.6884129999999999 0.6884129999999999 0.6884129999999999 ZT8-11 0.992642 0.992642 0.992642 ZT12-15 0.5419545 0.5419545 0.5419545 ZT16-19 1.11177 1.11177 1.11177 ZT20-23 0.6190720000000001 0.6190720000000001 0.6190720000000001