Populations and Samples

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What is a population in statistics?

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A population is the entire group of individuals or items that we want to study or draw conclusions about.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is a sample in statistics?

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A sample is a subset of the population that is selected for the purpose of conducting a study.

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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 the population has an equal chance of being selected.

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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.

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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 strata.

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CCSS.HSS.IC.B.3

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What is biased sampling?

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Biased sampling occurs when certain members of the population are more likely to be selected 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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What is the difference between a sample and a population?

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A sample is a smaller group selected from the population, while the population includes all members of the group being studied.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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Why is random sampling important?

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Random sampling is important because it helps ensure that the sample is representative of the population, reducing bias.

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CCSS.HSS.IC.B.3

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What is a convenience sample?

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A convenience sample is a type of non-random sampling where members are selected based on their easy availability.

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CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is a survey?

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A survey is a method of collecting data by asking questions to a group of people.

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CCSS.6.SP.B.5B