Sampling

• random sampling

  • where every participant has an equal chance of being selected.
  • Advantages: sample will represent the target population
  • disadvantages: cost and time is lengthy
• stratified sampling

  • where subgroups are divided into specific categories within a sample and randomly selected from these categories
  • Advantages: highly representative of the target population
  • Disadvantages: extremely time consuming and difficult
• opportunity sampling

  • selecting people who are willing and available at the time of the study
  • Advantages: quick and easy sampling method
  • Disadvantages: not a representative sample and could be bias
• systematic sampling

  • where every Nth member of the population Is chosen
  • Advantages: should provide a representative sample
  • Disadvantages: very difficult to achieve (cost, time, money)
• Volunteer sampling

  • where participants volunteer themselves through a notice or online application
  • Advantages: easy to conduct
  • Disadvantages: may be biased due to a similar group of people volunteering themselves, not representative