Statistical Studies and Sampling Methods

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What is a sample in statistical studies?

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A sample is a subset of individuals selected from a larger population, used to represent that population in a study.

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What is a population in statistical studies?

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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 census?

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

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What is a sample survey?

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A sample survey is a study that collects data from a subset of a population to infer information about the whole population.

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What is an observational study?

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An observational study is a research method where the researcher observes and records behavior 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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What is a biased sample?

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

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What is systematic sampling?

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Systematic sampling is a method where every nth individual is selected from a list or sequence.

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What is simple random sampling?

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Simple random sampling is a method where every individual in the population has an equal chance of being selected.

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What is voluntary response sampling?

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Voluntary response sampling is a method where individuals choose to participate in the survey, often leading to bias.