Populations & Samples

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What is a sample in statistics?

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A sample is a part of a group being surveyed.

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What is a population in statistics?

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A population is the entire group that is the subject of a survey or study.

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What does it mean for a sample to be biased?

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A biased sample is one that does not accurately represent the population, often due to the method of selection.

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What is a random sample?

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

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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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Why is it important to have an unbiased sample?

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An unbiased sample ensures that the results of a survey or study are valid and can be generalized to the larger population.

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What is the difference between a sample and a population?

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

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What is a survey?

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A survey is a method of collecting data by asking questions to a group of people.

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What is sampling error?

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Sampling error is the difference between the results obtained from a sample and the actual characteristics of the population.

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What is convenience sampling?

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Convenience sampling is a non-random sampling method where participants are selected based on their easy availability.