Sampling

• Stratified sampling definition: a sampling technique which involves establishing sub groups (strata) within the population investigated and picking participants to create a representative sample in the same proportion
• Systematic sampling definition: a sampling technique that involves establishing a method to pick participants evenly distributed through the population
• Systematic sampling example

  picking every 10th person for the study
• Random sampling definition: a sampling technique that involves randomly generating participants from the population by any randomisation technique
• Random sampling example


  random name generator or picking names out of a hat
• Volunteer sampling definition: a sampling technique that involves using participants who volunteer to take part in a study
• Volunteer sampling example


  adverts or social media
• Opportunity sampling definition: a sampling technique involving obtaining a sample of people who are available at the time of collecting the sample
• Quota sampling definition: a sampling technique which involves selecting participants based on certain characteristics such as age, gender, ethnicity etc.
• Opportunity sampling example


  asking people in a shopping centre at a certain time
• Generalise definition: to attribute information from a sample to the rest of the population
• Target population definition: The group that the researchers draw the sample from and wants to be able to generalise the findings to
• Representative definition: the sample is a fairly accurate reflection of the population from which the sample is drawn
• Bias definition: an inclination to a certain position or thought