12/03 Determining Sampling Methods

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What is a Cluster Random Sample?

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A sampling method where the population is divided into clusters (usually geographically), and entire clusters are randomly selected to be included in the sample.

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What is a Simple Random Sample?

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A sampling method where every individual in the population has an equal chance of being selected.

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What is a Stratified Random Sample?

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A sampling method that involves dividing the population into subgroups (strata) and then randomly selecting samples from each stratum.

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What is a Census?

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A method of data collection that involves gathering information from every member of the population.

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What is the main difference between Simple Random Sampling and Stratified Random Sampling?

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Simple random sampling does not involve dividing the population into subgroups, while stratified random sampling does.

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What is a Convenience Sample?

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A sampling method where individuals are selected based on their easy availability and proximity to the researcher.

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What is a Systematic Sample?

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A sampling method where individuals are selected at regular intervals from a randomly ordered list.

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What is Voluntary Response Sampling?

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A sampling method where individuals choose to participate in the survey or study, often leading to biased results.

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Why might a mall interviewer's sample be biased?

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The sample may be biased because it only includes people who are shopping at the mall, which may not represent the entire population of city residents.

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What is the potential issue with using a sample of mall shoppers to estimate spending for all city residents?

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Mall shoppers may have different spending habits compared to the general population, leading to inaccurate estimates.