review observational &experimental survey

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What is an observational study?

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

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What is an experimental study?

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An experimental study is a type of research where the researcher manipulates one or more variables to determine their effect on a dependent variable.

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Define 'population' in research.

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A population consists of all subjects (human or otherwise) that are being studied.

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What is a sample in research?

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A sample is a subset of the population selected for observation and analysis.

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How do you determine if a study is observational or experimental?

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If the researcher manipulates variables, it is experimental; if they only observe without manipulation, it is observational.

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

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A control group is used as a baseline to compare the effects of the experimental treatment.

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What is random sampling?

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Random sampling is a technique where each member of the population has an equal chance of being selected for the sample.

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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities, while quantitative data involves numerical measurements.

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What is a survey in research?

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A survey is a method of collecting data by asking questions to a group of people.

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What is bias in research?

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Bias refers to any systematic error in the design, conduct, or analysis of a study that leads to incorrect conclusions.