Math 4 ~ Review: Exper/Observ Study, Pop/Sample & Para/Stat

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What is a sample in research?

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A sample is a subset of a population selected for observation and analysis.

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What is a population in research?

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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 the difference between a sample and a population?

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A sample is a smaller group selected from the population, while the population includes all members of the group.

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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 an experimental study?

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An experimental study involves manipulating one variable to determine if it causes a change in another variable.

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What is a census?

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A census is a survey that attempts to collect data from every member of a population.

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What is the purpose of sampling in research?

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Sampling allows researchers to gather data and make inferences about a population without surveying every individual.

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What is a random sample?

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A random sample is a subset of a population where each member has an equal chance of being selected.

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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 the significance of sample size in research?

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Larger sample sizes generally lead to more reliable and valid results, reducing the margin of error.