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Statistics (Experimental (Randomness (No systematic differences between…

- - - - Social Desiribility
      - Poorly written
    - - Underrepresentation
      - Voluntary bias: people who complete surveys are different from those who do not
    - - Cluster sampling: creates clusters that are naturally occuring and randomly selects a few of them instead of selecting individuals.
      - Snowball: population difficult to reach. Respondents are asked to help recruit people.
      - Stratified Random: split population into groups of interest and ramdomly selects people from each of the stratas.