Populations & Samples

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What is a population in statistics?

Back

The entire group of objects or individuals considered for a survey.

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What is a sample in statistics?

Back

A part of a group being surveyed.

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What is a random sample?

Back

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

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Why is it important to have a representative sample?

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A representative sample accurately reflects the characteristics of the population, leading to valid conclusions.

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What is the difference between a population and a sample?

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A population includes all members of a defined group, while a sample is a subset of that group.

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What does it mean to survey a population?

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To collect data from individuals in the population to understand their characteristics or opinions.

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What is a convenience sample?

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A sample taken from a group that is easy to reach, which may not represent the population well.

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What is stratified sampling?

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A method of sampling that involves dividing the population into subgroups and taking samples from each.

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What is systematic sampling?

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A method of sampling where you select every nth individual from a list of the population.

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What is the purpose of sampling in research?

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To gather information about a population without surveying every individual.