Random Samples

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What is a random sample?

Back

A random sample is a subset of individuals chosen from a larger population, where each individual has an equal chance of being selected.

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CCSS.HSS.IC.B.3

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Why is it important to use random samples in surveys?

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Using random samples helps to ensure that the survey results are representative of the entire population, reducing bias.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is the difference between a sample and a population?

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A population includes all members of a specified group, while a sample is a smaller group selected from that population.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is a biased sample?

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A biased sample is one that does not accurately represent the population, often due to non-random selection methods.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is an unbiased sample?

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An unbiased sample is one that accurately reflects the characteristics of the population from which it is drawn.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is systematic sampling?

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Systematic sampling involves selecting every nth individual from a list or sequence, ensuring a random starting point.

Tags

CCSS.HSS.IC.B.3

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What is convenience sampling?

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Convenience sampling involves selecting individuals who are easiest to reach, which can lead to bias.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is stratified sampling?

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Stratified sampling involves dividing the population into subgroups (strata) and randomly sampling from each stratum.

Tags

CCSS.HSS.IC.B.3

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What is the purpose of surveying a sample?

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The purpose of surveying a sample is to gather information about a population without needing to survey every individual.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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How can you determine if a sample is biased?

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A sample can be determined to be biased if the selection method favors certain individuals or groups over others.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1