Method: Statsample::StratifiedSample#mean

Defined in:
lib/statsample/multiset.rb

#mean(field) ⇒ Object

Population mean based on strata



247
248
249
250
251
 
# File 'lib/statsample/multiset.rb', line 247

def mean(field)
  @ms.sum_field(field) {|s_name,vector|
  stratum_ponderation(s_name)*vector.mean
  }
end