condition mean min max ZT0-3 0.7730238333333334 0.6072425 0.8637695 ZT4-7 0.42388400000000004 0.42388400000000004 0.42388400000000004 ZT8-11 0.443839 0.443839 0.443839 ZT12-15 0.5518955000000001 0.3708755 0.7329155 ZT16-19 0.8274664999999999 0.8274664999999999 0.8274664999999999 ZT20-23 0.680202 0.680202 0.680202