sampling

• What are the 5 types of sampling and explain


  1.random sampling: equal chance of being selected

  2. systematic: selecting every nth person from a list

  3. stratified: sample reflects the proportion of people within different populations

  4. opportunity sampling: choosing whoever is available

  5. volunteer sampling: participants self select themselves.
• the evaluations for sampling

  random sampling: No researcher bias, time consuming and may end up with bias

  systematic: no researcher bias, fairly representative, may be a biased sample

  stratified: no researcher bias, representative, cant account for all sub groups

  opportunity: convenient, researcher bias, unrepresentative

  volunteer: less time consuming, attracts a certain type of person.
• Opportunity sampling: Quick and cheap but not representative so results aren't generalisable
• Systematic sampling: Time consuming, no researcher bias but can be biased if there's an uneven distribution of characteristics