Ch 4 Collecting Data Review #1

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What is nonresponse bias?

Back

Nonresponse bias occurs when individuals selected for a survey do not respond, leading to a potential distortion of the results because the opinions of non-respondents may differ from those who participated.

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What is undercoverage in sampling?

Back

Undercoverage is a type of sampling bias that occurs when some groups in the population are left out of the sampling process, resulting in a sample that does not accurately represent the entire population.

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What is response bias?

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Response bias refers to the tendency of respondents to answer questions inaccurately or falsely, often due to the wording of the questions or the social desirability of certain answers.

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What is a convenience sample?

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A convenience sample is a non-probability sampling method where the sample is taken from a group of people easy to reach, which may not represent the broader population.

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What is a voluntary response sample?

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A voluntary response sample is a type of sampling where individuals can choose to participate, often leading to bias as those with strong opinions are more likely to respond.

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What is the significance of sample size in surveys?

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Sample size is crucial in surveys as larger samples tend to provide more accurate and reliable results, reducing the margin of error and increasing the confidence in the findings.

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What does it mean for a study to be biased?

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A study is considered biased if the results systematically favor one outcome over another, often due to flaws in the sampling method or data collection process.

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What is the difference between a population and a sample?

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A population is the entire group of individuals or instances about whom we hope to learn, while a sample is a subset of the population selected for the actual study.

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What is the purpose of random sampling?

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Random sampling aims to select individuals from a population in such a way that every individual has an equal chance of being chosen, which helps to eliminate bias.

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What is the role of surveys in data collection?

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Surveys are tools used to gather information from a group of individuals, allowing researchers to collect data on opinions, behaviors, or characteristics of a population.