Representative and Biased Samples

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What is a Representative Sample?

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A representative sample is a subset of a population that accurately reflects the members of the entire population.

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What is a Biased Sample?

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A biased sample is a subset of a population that does not accurately reflect the members of the entire population, leading to skewed results.

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Why is it important to have a representative sample?

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A representative sample ensures that the results of a survey or study can be generalized to the larger population.

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What is an example of a biased sample?

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Asking only the first 10 people who enter a store about their favorite product.

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What is an example of a representative sample?

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Surveying every 5th customer who enters a store throughout the day.

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How can you avoid bias in sampling?

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By using random selection methods to choose participants from the population.

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What is the difference between a sample and a population?

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A sample is a smaller group selected from a population, which is the entire group of interest.

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What does it mean to stratify a sample?

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Stratifying a sample means dividing the population into subgroups and then taking a sample from each subgroup.

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What is convenience sampling?

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Convenience sampling is selecting a sample based on ease of access rather than random selection.

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What is systematic sampling?

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Systematic sampling involves selecting every nth individual from a list of the population.