What is sampling
A small group of people selected from a population
What are the types of sampling
Opportunity, random, stratified, systematic and volunteer
Discuss opportunity sample
Recruiting those easily available
Discuss random sampling
Use a random technique for example the lottery method or random number generator
Discuss stratified sample
Identify relevant subgroups, randomly select appropriate portion from each subgroup
Discuss systematic sample
Select every nth person
Discuss a volunteer sample
People respond to an advertisement
Evaluate opportunity sample
They are easy because they are there but biased
Evaluate random sample
Unbiased but takes time
Evaluate stratified sample
Proportional, representative and on biased, but time-consuming
Evaluate systematic sample
Unbiased but not truly random
Evaluate volunteer sample
Variety of participants, but volunteer bias
