Population Vs Sample

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What is a sample in statistics?

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A sample is a smaller, representative group drawn from a larger population.

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What is a population in statistics?

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A population is the entire group of individuals or items that we want to study.

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What is a parameter?

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A parameter is a characteristic or measure obtained by using all the data from a population.

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What is a statistic?

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A statistic is a characteristic or measure obtained by using data from a sample.

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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 specified group, while a sample includes only a subset of that group.

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What is the purpose of using a sample?

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The purpose of using a sample is to make inferences about the population without having to study the entire group.

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What is a representative sample?

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A representative sample accurately reflects the characteristics of the population from which it is drawn.

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What is sampling bias?

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Sampling bias occurs when some members of a population are more likely to be selected than others, leading to an unrepresentative sample.

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What is a simple random sample?

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A simple random sample is a sample in which every member of the population has an equal chance of being selected.

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What is a stratified sample?

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A stratified sample is a sample that is divided into subgroups (strata) and random samples are taken from each stratum.