Sampling

    Cards (18)

    • what is a population?
      a set of things we want to study
    • when we take a census what do we do?
      collect data about every member of the population
    • What is the Pro of using a Census?
      There is data for every member of the population
    • What is the cons of using a census?
      • May not have a sampling frame
      • Time consuming and expensive
      • Might be destructive
    • What can you do instead of taking a census?
      Take a sample of the population
    • what is a sample?and why is it used?
      Any subset of a population and used to make inferences about the entire populations
    • what is inferential statistics?
      where it help you come to conclusions and make predictions based on your data
    • what is quota sampling?
      Where a researcher makes sure that the proportions of groups in their sample are the same as they are in the population.
    • What are the Pros of Quota sampling?
      • more representative sampling than Opportunity
      • Quick, Cheap and easy
      • Easy to compare data groups within a sample
    • What are the Cons of Quota Sampling?
      • May not be very representative
      • Need the correct data of the population to create Quotas
    • What is systematic sampling?
      Where every nth element in a population is selected to be part of the sample.
    • what are the Pros of systematic sampling?
      • More likely to get a representative sample that with opportunity sampling or quota sampling
      • You don't need to randomly select every member of your sample
    • what are the cons of systematic sampling?
      • you need a sampling frame
      • There are certain samples that you can never get
      • still doesn't guarantee a representative sample
    • What is stratified sampling?
      the process of creating subgroups in a dataset according to various factors, such as age.
    • what is Strata?
      A subset of the population which is being sampled.
    • What are the pros of stratified sampling?
      very likely to give a really representative sample
    • what are the cons of stratified sampling?
      • can be tricky to decide which group in your population are the most important
      • incredibly time-consuming to do well
      • miss lable variables within strata
    • what type of sampling is very different to Quota sampling?
      Stratified sampling
    See similar decks