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Rehab Research

Chapter 23- Statistical Analysis of Relationships: The Basics

QuestionAnswer
What is correlation? the value an individual exhibits o one variable is related to the value he or she exhibits on another variable; CORRELATION IS NOT CAUSATION
What is the most frequently used correlation coefficient? the Pearson product moment correlation
What are the other correlation coefficients? Spearman's rho and Kendall's tau used with ranked or ordinal #s; phi, Cramer's V, and kappa used for nominal data
What are the major assumptions of correlation coefficients? 1 relationships between variables are assumed to be linear, 2 homoscedasticity, 3 both variables have enough variability to demonstrate a relationship
How are correlation coefficients interpreted? 1 the strength of the coefficient itself, 2 the variance shared by the two variables, 3 the statistical significance of the correlation coefficient, 4 the confidence intervals about the correlation coefficient
Created by: amwilliamson