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Which of the following is not a characteristic of diabetes mellitus?4-25-2013
Third Variable
A factor, often unmeasured, that can be the true cause behind the observed relationship between two variables.
Correlational Method
Research in which two or more variables are measured and compared to determine to what extent, if any, they are associated.
Quasi-Experimental Design
A research strategy that attempts to estimate the causal impact of an intervention without random assignment to treatment or control groups.
Experimental Method
A study in which a researcher manipulates a variable, referred to as the independent variable, measures possible effects on another variable, referred to as the dependent variable, and tries to hold all other variables constant.
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