AMDM Unit 4 Test Fall 2024

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What is an Experiment?

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An experiment is a research method where the researcher manipulates one variable to determine its effect on another variable, often involving a control group.

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What is a Survey?

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A survey is a research method used to collect data from a group of individuals, typically through questionnaires or interviews, to gather information about their opinions, behaviors, or characteristics.

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What is an Observational Study?

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An observational study is a research method where the researcher observes and records behavior or outcomes without manipulating any variables.

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What is the Margin of Error?

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The margin of error is a statistic that expresses the amount of random sampling error in a survey's results, indicating the range within which the true value lies.

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How does sample size affect the margin of error?

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As the sample size increases, the margin of error decreases, leading to more precise estimates of the population parameter.

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What is a Controlled Experiment?

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A controlled experiment is a type of experiment where one group is exposed to the treatment and another group (the control group) is not, allowing for comparison.

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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 researcher is interested in studying.

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What is the purpose of random sampling?

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Random sampling is used to ensure that every individual in a population has an equal chance of being selected, which helps to reduce bias in the results.

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What is a bias in research?

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Bias refers to any systematic error in the design, conduct, or analysis of research that can lead to incorrect conclusions.

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What is the role of a control group in an experiment?

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The control group serves as a baseline to compare the effects of the treatment, helping to isolate the impact of the independent variable.