Method: Statsample::StratifiedSample.proportion_variance_ksd_wor

Defined in:
lib/statsample/multiset.rb

.proportion_variance_ksd_wor(es) ⇒ Object 



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# File 'lib/statsample/multiset.rb', line 164

def proportion_variance_ksd_wor(es)
  n_total=calculate_n_total(es)
    es.inject(0){|a,h|
      val= (((h['N'].to_f / n_total)**2 * h['p']*(1-h['p'])) / (h['n'])) * (1- (h['n'].to_f / h['N']))
      a+val
    }
end