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Selecting a Sample (Sampling (Step in sampling (Identify the population,…

- - - - 1.Simple random sampling
        
        Equal & independent chance for all individuals
        
        Best single way to obtain a representative sample
      - 2.Stratified sampling
        
        Identified subgroup in the population
        
        1.Proportional stratified sampling
        
        2.Equal-sized or nonproportional stratified sampling
      - 3.Cluster sampling
        
        Randomly select group, not individual
        
        All the members of selected groups have similar characteristics
      - 4.Systematic sampling
        
        Not used very often
        
        Individuals are selected from a list taking every Kth name
- - - - 1.Convenience sampling-use of volunteers and existing groups
      - 2.Purposive sampling
      - 3.Quota sampling-often used in survey research when it is not possible to list all members of the population