Math 4 ~ Review: Experiment/Observ Study & Population/Sample

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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 or outcomes without manipulating any variables.

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What is an experiment in research?

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An experiment is a study in which the researcher manipulates one or more variables to determine their effect on a dependent variable.

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Define 'Population' in research.

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Population refers to the entire group of individuals or instances about whom we hope to learn.

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Define 'Sample' in research.

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A sample is a subset of the population that is selected for the study.

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What is the difference between population and sample?

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The population includes all members of a specified group, while a sample is a smaller group selected from that population.

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What is the purpose of a survey in research?

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A survey is used to gather information from a sample to make inferences about the population.

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What does it mean to conclude from a sample?

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To conclude from a sample means to make generalizations about the population based on the findings from the sample.

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What is a biased sample?

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A biased sample is one that does not accurately represent the population, leading to skewed results.

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What is random sampling?

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Random sampling is a technique where each member of the population has an equal chance of being selected for the sample.

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What is a convenience sample?

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