# TAILIEUCHUNG - Chương 18 - ĐO LƯỜNG LIÊN HỆ

## Parametric correlation requires two continuous variables measured on an interval or ratio scale. The coefficient does not distinguish between independent and dependent variables | Chương 18 ĐO LƯỜNG LIÊN HỆ Bivariate Correlation vs. Nonparametric Measures of Association Parametric correlation requires two continuous variables measured on an interval or ratio scale The coefficient does not distinguish between independent and dependent variables Bivariate Correlation Analysis Pearson correlation coefficient r symbolized the coefficient's estimate of linear association based on sampling data Correlation coefficients reveal the magnitude and direction of relationships Coefficient’s sign (+ or -) signifies the direction of the relationship Assumptions of r Linearity Bivariate normal distribution Bivariate Correlation Analysis Scatterplots Provide a means for visual inspection of data the direction of a relationship the shape of a relationship the magnitude of a relationship (with practice) Interpretation of Coefficients Relationship does not imply causation Statistical significance does not imply a relationship is practically meaningful Interpretation of .

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