Sampling Techniques Flashcard

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What is a Simple Random Sample?

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A sampling method where every individual has an equal chance of being selected. Example: A computer randomly selects 500 voters from a larger population.

Tags

CCSS.HSS.IC.B.3

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What is a Stratified Sample?

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A sampling method where the population is divided into subgroups (strata) and a random sample is taken from each stratum. Example: 10% of students are chosen from each grade in a school.

Tags

CCSS.HSS.IC.B.3

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What is Cluster Random Sampling?

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A sampling method where entire groups (clusters) are randomly selected, and all individuals within those groups are surveyed. Example: Selecting 5 schools and interviewing all teachers in those schools.

Tags

CCSS.HSS.IC.B.3

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What is Systematic Sampling?

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A sampling method where individuals are selected at regular intervals from a list. Example: Selecting every 49th student from a group of 496 students.

Tags

CCSS.HSS.IC.B.3

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What is Convenience Sampling?

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A non-random sampling method where individuals are selected based on ease of access. Example: Surveying the first 100 students alphabetically.

Tags

CCSS.HSS.IC.B.3

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What is the purpose of using random sampling?

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To ensure that the sample is representative of the population, reducing bias in the results.

Tags

CCSS.HSS.IC.B.3

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What is the difference between probability and non-probability sampling?

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Probability sampling involves random selection, giving each individual a known chance of being chosen, while non-probability sampling does not involve random selection.

Tags

CCSS.HSS.IC.B.3

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What is a biased sample?

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A sample that does not accurately represent the population, leading to skewed results. Example: Surveying only students who volunteer to participate.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is a population in research?

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The entire group of individuals or instances about whom we hope to learn. Example: All students in a school.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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What is a sample in research?

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A subset of the population selected for study. Example: 100 students chosen from a school to represent the entire student body.