Sampling and Bias

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What is sampling?

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Sampling is the process of selecting a subset of individuals from a population to estimate characteristics of the whole population.

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What is a simple random sample?

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A simple random sample is a subset of a population where each member has an equal chance of being selected.

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What is bias in sampling?

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Bias in sampling occurs when certain members of the population are more likely to be selected than others, leading to an inaccurate representation.

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What is statistical significance?

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Statistical significance indicates that the results observed in a study are unlikely to have occurred by chance.

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What is a control group?

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A control group is a group in an experiment that does not receive the treatment or intervention, used for comparison.

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What is randomization in experiments?

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Randomization is the process of randomly assigning participants to different groups to eliminate bias.

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What is undercoverage bias?

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

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What is a sample size?

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Sample size refers to the number of individuals included in a sample, which affects the reliability of the results.

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What is a population in research?

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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 a sampling error?

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Sampling error is the difference between the sample statistic and the actual population parameter.