Sampling Techniques

Question 1

Convenience / Opportunity Sampling

Answer 1

• Participants selected based on naturally occurring groups
• Sample depends on which people are available at the time
• However, you can’t be sure if the sample will be representative / generalizable

Question 2

Random Sampling

Answer 2

• Each member of the population has an equal chance of getting selected
• Selected through random # generators, pulling names out a hat etc
• Can’t be sure they’ll represent population

Question 3

Self-Selected Sampling

Answer 3

• Participants volunteer
• Can be advertised in local communities or through the internet

Question 3

Self-Selected Sampling

Answer 3

• Participants volunteer
• Can be advertised in local communities or through the internet

Question 4

Snowball Sampling

Answer 4

• Participants recruit other participants for the study

Question 5

Stratified Sampling

Answer 5

• Matches make-up of population
• Participants from various subgroups of the population are selected
• Subgroups typically share characteristics like income or education level

Question 6

Quota Sampling

Answer 6

• Gathers representative data from a group
• Requires that representative individuals are chosen from a specific subgroup
• The proportion and sample size are defined previously

Question 7

Purpose Sampling

Answer 7

• Participants selected based on characteristics of a population and objective of the study
• Unlike quote, the proportion and sample size are not defined previously