biased and unbiased samples

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What is a systematic random sample?

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A systematic random sample is a sampling method where every nth individual is selected from a list or queue, ensuring a structured approach to sampling.

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What is a simple random sample?

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A simple random sample is a sampling method where every individual in the population has an equal chance of being selected.

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What is a convenience sample?

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

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What is a voluntary response sample?

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A voluntary response sample is a sampling method where individuals choose to participate in the survey, often leading to biased results.

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What are biased samples?

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Biased samples are samples that do not accurately represent the population, leading to skewed results.

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What are unbiased samples?

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Unbiased samples are samples that accurately represent the population, allowing for valid conclusions to be drawn.

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Why is surveying all 7th grade boys considered a biased sample?

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Surveying all 7th grade boys is biased because it does not include girls or students from other grades, thus not representing the entire student population.

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What is the importance of having a representative sample?

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A representative sample is crucial because it ensures that the findings can be generalized to the larger population.

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What is the difference between biased and unbiased samples?

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Biased samples do not accurately reflect the population, while unbiased samples do, allowing for valid conclusions.

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What is an example of a biased sampling method?

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An example of a biased sampling method is surveying only students who are in the lunch line, as it excludes those who are not.