T5.1 Sampling and Bias

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What does it mean for a sample to be representative?

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A representative sample accurately reflects the characteristics of the population as a whole.

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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 the population are more likely to be selected than others, leading to an inaccurate representation.

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What is a convenience sample?

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A convenience sample is a type of non-probability sampling where the sample is taken from a group that is easily accessible.

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What is a census?

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

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What is a population in statistics?

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A population is the entire group of individuals or instances about whom we hope to learn.

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What is a sample in statistics?

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A sample is a subset of a population used to represent the entire group.

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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 a stratified random sample?

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A stratified random sample is a sampling method that involves dividing the population into subgroups and taking a random sample from each.

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What is a cluster random sample?

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A cluster random sample is a sampling method where the population is divided into clusters, and entire clusters are randomly selected.