condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0088520135 0.0 0.017704027 ZT8-11 0.0 0.0 0.0 ZT12-15 0.004106403 0.0 0.008212806 ZT16-19 0.00993694625 0.0 0.0198738925 ZT20-23 0.0670368635 0.0577023065 0.07637142050000001