Bias and Sampling Methods

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What is Simple Random Sampling?

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A sampling method where every individual has an equal chance of being selected, often achieved by randomly picking names from a list.

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Define Population in statistics.

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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 Nonresponse bias?

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A type of bias that occurs when individuals selected for the sample cannot be contacted or refuse to participate.

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Why is random selection important in sampling?

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Random selection helps to reduce bias and ensures that the sample represents the population accurately.

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What is Convenience Sampling?

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A sampling method where individuals are selected based on their easy availability and proximity to the researcher.

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What is Response Bias?

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A bias that occurs when respondents provide inaccurate answers due to misunderstanding, misinterpretation, or social desirability.

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What is Stratified Sampling?

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A sampling method that involves dividing the population into subgroups (strata) and taking a random sample from each.

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What is Undercoverage in sampling?

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A bias that occurs when some members of the population are inadequately represented in the sample.

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What is Voluntary Response Sampling?

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A sampling method where individuals choose to participate, often leading to biased results as it attracts those with strong opinions.

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What is Systematic Random Sampling?

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A sampling method where you select every nth individual from a list after a random starting point.