Random sampling

• What is the principle of random sampling?

  Every member has the same chance of inclusion
• What are the advantages of random sampling?

  • Unbiased selection by the researcher
  • Everyone has an equal chance of selection
  • Results can be generalized to the population
• What are the disadvantages of random sampling?

  • Requires all random participants to be available
  • If one is unavailable, selection may become biased
  • Random sampling might still be biased