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Sampling

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Mind Map on Sampling, created by rachbreen on 13/05/2013.
rachbreen
Mind Map by rachbreen, updated more than 1 year ago
rachbreen
Created by rachbreen almost 11 years ago
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Resource summary

Sampling
  1. Opportunity
    1. Whoever happens to go past
      1. Lots of unconscious bias
        1. Attractive
          1. Owe you a favour
        2. People in this sample like to help
        3. Random
          1. Everyone from targer population has same chance of being used
            1. Names in a hat is usual method
            2. Not everyone chosen will want to take part
              1. Have to replace, not as random
            3. Volunteer
              1. Quick and easy
                1. Not typical members of population
                  1. Helpful
                  2. Where ad is placed, get certain type of people
                    1. Students
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