condition mean min max ZT0-3 9.548163 9.548163 9.548163 ZT4-7 9.160264000000002 9.160264000000002 9.160264000000002 ZT8-11 9.362016 9.362016 9.362016 ZT12-15 8.883805500000001 8.883805500000001 8.883805500000001 ZT16-19 10.268957 10.268957 10.268957 ZT20-23 9.7712415 9.7712415 9.7712415