Checkpoint: Sampling Methods

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What is Simple Random Sampling?

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A sampling method where every individual has an equal chance of being selected. Example: Drawing names from a jar.

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What is Systematic Sampling?

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A sampling method where you select every nth individual from a list. Example: Surveying every 5th student in a class.

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What is Convenience Sampling?

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A sampling method where you select individuals who are easiest to reach. Example: Asking friends in class for their opinions.

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What is Stratified Sampling?

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A sampling method where the population is divided into subgroups (strata) and random samples are taken from each. Example: Surveying students from different grades.

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What is Cluster Sampling?

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A sampling method where the population is divided into clusters, and entire clusters are randomly selected. Example: Choosing random classrooms to survey.

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What is the Population of Interest?

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The entire group that you want to draw conclusions about. Example: All students at North River High School.

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What is a Sample?

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A subset of individuals selected from a larger population. Example: 100 students from North River High School.

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What is the difference between Population and Sample?

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Population includes all individuals of interest, while a sample is a smaller group selected from that population.

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What is Voluntary Sampling?

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A sampling method where individuals choose to participate. Example: Online surveys where anyone can respond.

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What is Bias in Sampling?

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A systematic error that leads to an unrepresentative sample. Example: Only surveying students who stay after school.