11/21 Types of Statistical Studies

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What is an Experiment in statistical studies?

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An experiment is a research method where the researcher manipulates one or more variables to observe the effect on another variable, often involving random assignment to groups.

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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 a Census?

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A census is a comprehensive survey that attempts to collect data from every member of a population.

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What is a Sample Survey?

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A sample survey is a method of collecting data from a subset of a population to make inferences about the entire population.

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What is Random Assignment?

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Random assignment is the process of assigning participants to different groups in an experiment using randomization to ensure each participant has an equal chance of being placed in any group.

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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, helping to isolate the effect of the independent variable.

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What is the Independent Variable in an experiment?

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The independent variable is the variable that is manipulated or changed by the researcher to observe its effect on the dependent variable.

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What is the Dependent Variable in an experiment?

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The dependent variable is the outcome or response that is measured in an experiment, which is affected by changes in the independent variable.

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What is the difference between Experimental and Observational Studies?

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Experimental studies involve manipulation of variables and random assignment, while observational studies involve observing and recording data without manipulation.

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What is a Confounding Variable?

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A confounding variable is an outside influence that can affect the results of an experiment, potentially leading to incorrect conclusions.