Math 4: Review of Sampling Methods and Bias

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What is sampling in statistics?

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Sampling is the process of selecting a subset of individuals from a population to estimate characteristics of the whole population.

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What is bias in sampling?

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Bias in sampling occurs when certain members of a population are systematically more likely to be selected than others, leading to an inaccurate representation.

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What is a simple random sample?

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A simple random sample is a sampling method where every member of the population has an equal chance of being selected.

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What is systematic sampling?

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Systematic sampling involves selecting every nth individual from a list of the population.

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What is convenience sampling?

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

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What is self-selected (volunteer) sampling?

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Self-selected sampling occurs when individuals choose to participate in a study, often leading to bias.

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Why is the study of the hospital gym biased?

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The study is biased because it only asks night-shift ER staff, who may have different needs and preferences than the entire hospital staff.

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What is the least biased sampling method?

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The least biased sampling method is one that randomly selects individuals from the entire population, ensuring all have an equal chance.

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What is the difference between systematic and simple random sampling?

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In systematic sampling, every nth individual is selected, while in simple random sampling, every individual has an equal chance of being selected without a fixed interval.

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What is an example of convenience sampling?

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An example of convenience sampling is surveying people at a mall because they are easily accessible.

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