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Population and Sample



                       POPULATION























                                                                        SAMPLE         31















                          Target          ( Descriptive Statistics )
                        Population                                               Parameter


                Random                    Infer                     Describe a
                Selection                 ( Inferential Statistics )  characteristic
                                     Yes
                              Sample
                                     Selection with prob.?                         Statistic
                                     No
                                          ( Descriptive Statistics )
                  • Pop:  the entire group of individuals that a researcher wishes
                     to study.


                  • Sample:  portion of a population that is selected for
                     observation.


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