Data and Sampling

    Subdecks (2)

    Cards (8)

    • Sampling
      • Target pop can’t be tested
      • Representative: Generalisable (pop validity)
      • Unrepresentative: Over-/under- (sampling bias)
      Random
      • Representative
      • Unbiased
      • No researcher influence so generalisable
      • Hard unless pop small
      • Some won't consent; unrepresentative
      Opportunity
      • Ethical
      • Easy
      • Quick
      • Large sample
      • Unrepresentative
      • Selection bias, ungeneralisable
      Stratified
      • Proportional representation
      • Time-consuming
      • Difficult find correct proportions
      Volunteer
      • Motivated
      • Less likely drop out
      • Easier than random
      • Unrepresentative
      • Ungeneralisable
      • Demand Characteristics
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