condition mean min max ZT0-3 0.5627406125000001 0.42573382200000004 0.699747403 ZT4-7 0.9913077162499999 0.7017516615 1.280863771 ZT8-11 1.8869346157500002 1.7062879025000002 2.0675813290000002 ZT12-15 2.4383801925000004 2.2824905315 2.5942698535 ZT16-19 2.3858934740000004 2.184469523 2.587317425 ZT20-23 2.5548659447500004 2.5543845785 2.5553473110000002