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Interpretation of research data: regression analysis.

The types of problems that can be analyzed with regression analysis, and interpretation of the resulting summary statistics, are discussed. Linear and multiple regression models, regression coefficients are described. Regression analysis can answer questions about the existence and strength of relationships and the relative importance of independent variables, and can forecast the outcome from changes in the values of independent variables. Multivariate regression analysis can detect the contribution of each of several independent variables on the dependent variable.