#spurious_correlation  a correlation between two variables (e.g., between the number of electric motors in the home and grades at school) that does not result from any direct relation between them (buying electric motors will not raise grades) but from their relation to other variables
  supertype:  #correlational_statistics__correlation  a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other
     supertype:  #statistic  a datum that can be represented numerically
        supertype:  #datum__data_point  an item of factual information derived from measurement or research
           supertype:  #information  knowledge acquired through study or experience or instruction
              supertype:  pm#thing_that_can_be_seen_as_a_relation  usable as relation type
                 supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                    supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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