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9 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are populations?
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Everybody in some group
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What are samples?
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A subset of that group
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What are representative samples?
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People who have the same attributes of the people in your population
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What are biased samples?
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When the sample doesn't represent the true population/leaves people out.
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Example: If a study was trying to determine the usage of illegal drugs in teens and they conducted it at a hs, it would be biased since dropouts and homeschooled kids weren't represented.
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What is a random sampling technique?
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Picking people at random from the population.
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How is random sampling problematic?
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You may be ignoring systematic features of the population. This method may also be impractical.
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Example: ignoring religiousness when polling attitudes towards abortion
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What is stratified sampling?
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Allows researchers to capture systematic aspects of the population that might relate to the study
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Example: If 60% of your population was protestant and 40% of your population was catholic, then you would want the same proportions in your representative sample.
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What is clustered sampling?
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Allows researchers to sample somewhat randomly, but in a more practical way.
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If you wanted a sample of the US population, then you might select random states to participate
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What is convenience sampling?
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Gathering data from volunteers that are easily accessible.
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Adequacy of this technique depends on what you are studying and the conclusions you want to make
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