Cause and Effect: Statistical Perspectives
Evidence of relationships between variables commonly leads to an interest in the reasons for and the nature of the relationships. In some cases, scientists can provide a graphical picture that displays a cause-effect structure for the variables, and the aim is to establish the relative importance of the different connections. Figure 20.1.1 provides an illustration. Of primary interest to the researchers is the degree of disability suffered by a person afflicted with rheumatoid arthritis and the importance of the identified factors that are believed or known to influence the degree of disability.
KeywordsExplanatory Variable Path Analysis Path Coefficient Unique Contribution Indirect Path
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