Sampling and Surveys : Bias Practice

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What is a sample in statistics?

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A sample is a subset of individuals or objects selected from a larger population used to make inferences about the population.

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Define 'population' in the context of surveys.

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A population is the entire group of individuals or objects that a researcher is interested in studying.

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What is a random sample?

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A random sample is a sample in which each individual or object in the entire population has an equal chance of being selected.

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What is a census?

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A census is the process of gathering information/data from every member of the population.

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What is an observational study?

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An observational study is a type of research where the researcher observes and records behavior without manipulating any variables.

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What is bias in surveys?

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Bias in surveys refers to any systematic error that leads to an incorrect representation of the population.

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What are biased questions?

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Biased questions are those that lead respondents to answer in a particular way, often influencing the results.

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What is the difference between a survey and an experiment?

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A survey collects data through questions, while an experiment involves manipulating variables to observe effects.

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What is a matched pairs design?

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A matched pairs design is a type of experimental design where participants are paired based on similar characteristics.

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What is the purpose of sampling in research?

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The purpose of sampling is to gather data from a subset of a population to make inferences about the whole population.