Representative & Random Sampling

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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 characteristics of the whole population.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is random sampling?

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Random sampling is a technique where each member of a population has an equal chance of being selected for the sample.

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CCSS.HSS.IC.B.3

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Why is random sampling important?

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Random sampling is important because it helps to eliminate bias and ensures that the sample is representative of the population.

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CCSS.HSS.IC.B.3

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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 individuals or items being studied.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is sampling bias?

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Sampling bias occurs when certain members of a population are more likely to be selected for the sample than others, leading to an unrepresentative sample.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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How can you create a random sample from a list of students?

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You can create a random sample by assigning each student a number and using a random number generator to select students.

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CCSS.HSS.IC.B.3

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What is stratified sampling?

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Stratified sampling is a method where the population is divided into subgroups (strata) and random samples are taken from each stratum.

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CCSS.HSS.IC.B.3

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What is systematic sampling?

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Systematic sampling involves selecting every nth member from a list of the population after a random starting point.

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CCSS.HSS.IC.B.3

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Why is it important to have a large enough sample size?

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A large enough sample size is important to ensure that the results are statistically significant and can be generalized to the population.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is convenience sampling?

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Convenience sampling is a non-random method where samples are taken from a group that is easily accessible.

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CCSS.HSS.IC.B.3