condition mean min max ZT0-3 1.33095 1.33095 1.33095 ZT4-7 1.36722 1.36722 1.36722 ZT8-11 0.8677745 0.8677745 0.8677745 ZT12-15 1.60637 1.60637 1.60637 ZT16-19 3.1786250000000003 3.1786250000000003 3.1786250000000003 ZT20-23 2.0744 2.0744 2.0744