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Market Research-Sampling (Types of Sampling (Convenience sampling…

- - - - Advantages
        
        Quick and easy
        
        Doesn't need complete population information
        
        Good for face-to-face surveys
      - Disavantages
        
        Greater risk of sampling error
        
        Expensive if the clusters are large
  - - - Subjects are readily available
      - Large amounts of information can be gathered quickly
    - - Prone to volunteer bias
      - The sample is not representative of the entire population, so results can't speak for them - inferences are limited. future data
  - - - Advantage
        
        Good for providing illustrative examples or case studies
      - Disadvantage
        
        Very prone to bias
        
        Cannot extrapolate from sample
        
        Samples often small
  - - - Disadvantage
        
        Not random, so some risk of bias
        
        Need to understand the population to be able to identify the basis of stratification
      - Advantage
        
        Quick and easy way of obtaining a sample
  - - - Advantage
        
        Can calculate both estimate of the population and sampling error
        
        Simple to design and interpret
      - Disadvantage
        
        Need a complete and accurate population listing
        
        May not be practical if the sample requires lots of small visits over the country
  - - - Advantage
        
        Easier to extract the sample than via simple random
        
        Ensures sample is spread across the population
      - Disadvantage
        
        Can be costly and time-consuming if the sample is not conveniently located