condition mean min max ZT0-3 0.499826 0.499826 0.499826 ZT4-7 0.0 0.0 0.0 ZT8-11 0.43014050000000004 0.43014050000000004 0.43014050000000004 ZT12-15 0.15732 0.15732 0.15732 ZT16-19 0.6915015 0.6915015 0.6915015 ZT20-23 0.411019 0.411019 0.411019