condition mean min max ZT0-3 0.024345810250000002 0.0 0.048691620500000005 ZT4-7 0.4786518532499999 0.161358272 0.7959454344999999 ZT8-11 4.2182902787500005 2.920937114 5.5156434435 ZT12-15 7.075202359 6.334049392 7.816355326 ZT16-19 5.5576577435 4.437703181 6.677612306 ZT20-23 12.347938280000001 10.5372772 14.15859936