CHYS 2P52 Study Guide - Quiz Guide: Regression Analysis, Measuring Instrument, Sample History

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To establish the existence of a cause-and-effect relationship between two variables. To accomplish this goal, an experiment manipulates one variable while a second variable is measured and other variables are controlled. Experiment: also called true experiment, must demonstrate that changes in one variable are directly responsible for causing changes in the second variable, to rule out the possibility of a coincidental relationship. The difference between experimental research studies and other types of research: A research study is called an experiment only if it satisfies these four elements/requirements. Some research studies qualify as true experiments whereas other studies, such as correlational studies, do not. In casual conversation, people tend to refer to any kind of research study as an experiments. Independent variable: the variable that is manipulated by the researcher, by creating a set of treatment conditions. Levels of the independent variable: the specific conditions that are used in the experiment.

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