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13 Cards in this Set
- Front
- Back
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Response rate |
Percentage of people out of the total number available who respond to a survey |
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Population |
Group of individuals a researcher seeks to learn about from a research study |
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Sample |
Group of individuals chosen from the population to represent it in a research study |
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Sampling error |
The difference between the observations in a population and in the sample that represents the population in a study Occurs in all research because the sample will never give you the same observations of the entire population |
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Probability sample |
Sample chosen such that individuals are chosen with a specific probability Individuals have a specific probability of being chosen from the population So it is the most likely to represent the population |
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Convenience / purposive sample |
Sample chosen such that the probability of an individual being chosen cannot be determined |
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Types of probability samples |
Simple random sample cluster sample stratified random sample |
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Simple random sample |
Sample chosen randomly from the population such that each individual has an equal chance of being selected Ex: students are chosen randomly from you list of all students at a university |
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Cluster sample |
Clusters of individuals are identified and then a subset of clusters is randomly chosen to sample from Ex: getting a sample of college students by first choosing 25 colleges then choosing students from each of those colleges Or Getting a sample of doctors by first using a certain amount of hospitals then choosing doctors from those hospitals |
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Stratified random sample |
Members of a population are randomly selected such that the proportion of a group in the sample is equal to the proportion of the group in the population using random sampling Ex: getting a sample of registered voters by first randomly selecting a list of Democrats and Republicans that are equal to the portion of Democrats and Republicans in the US 40% of Americans are republicans so ensure that 40% of your samle is Republican |
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Volunteer sample |
Sample chosen from the population such that available individuals are chosen based on who volunteers to purchase |
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Quota sample |
Sample chosen from the population such that available individuals are chosen with equivalent proportions of individuals for a specific characteristic in the population and Sample But no random selection since using available individuals Ex: |
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Internet sample |
Sample chosen from the population by recruiting on the internet |
