Statistics- Sampling Methods

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What is a biased study?

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A biased study is one that systematically favors certain outcomes or groups over others, leading to inaccurate or misleading results.

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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 has an equal chance of being selected, often achieved by random selection methods like drawing names from a hat.

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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 choose to participate, often leading to bias as it tends to attract those with strong opinions.

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What is the source of bias in a Voluntary Response Sample?

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The source of bias in a Voluntary Response Sample is that only individuals with strong opinions are likely to respond, which may not represent the overall population.

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What is a Stratified Sample?

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A Stratified Sample is a sampling method where the population is divided into subgroups (strata) and random samples are taken from each stratum.

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How can bias affect the results of a study?

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Bias can lead to skewed results that do not accurately reflect the true characteristics or opinions of the population being studied.

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What is the difference between a sample and a population?

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A sample is a subset of individuals selected from a larger population, which is the entire group of individuals that the study aims to understand.

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What is the importance of random sampling in research?

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Random sampling is important because it helps ensure that the sample is representative of the population, reducing bias and increasing the validity of the results.

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What is a convenience sample?

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A convenience sample is a non-random sampling method where individuals are selected based on their easy availability, which can introduce bias.

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What is a systematic sample?

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A systematic sample is a sampling method where individuals are selected at regular intervals from a randomly ordered list.