def scan_statistics(scan_id)
      r = execute(make_xml('ScanStatisticsRequest', 'scan-id' => scan_id))
      if r.success
        ScanSummary.parse(r.res.elements['//ScanSummary'])
      else
        false
      end
    end
def scan_statistics(scan_id)
      r = execute(make_xml('ScanStatisticsRequest', 'scan-id' => scan_id))
      if r.success
        ScanSummary.parse(r.res.elements['//ScanSummary'])
      else
        false
      end
    end
Get scan statistics, including node and vulnerability breakdowns.

 @param [Fixnum] scan_id Scan ID to retrieve statistics for.
 @return [ScanSummary] ScanSummary object providing statistics for the scan.