Stratified Sampling

• Stratified Sampling


  Selecting within strata, choosing within the same proportion of characteristics within a population

  • Identify strata and proportion
  • Random sampling from each stratum
• (+) A03: Representative


  Due to being in proportion with target population, results are representative and can be generalised, avoiding researcher bias
• (-) A03: Limiting Characteristics

  Not all characteristics can be stratified, bias in choosing the most important characteristics to stratify, can also be time consuming