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EPPP Psychology

Category - Research Methods and Statistics

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Choosing what type of bivariate correlation coefficient to use in statistical analysis depends on what type of data variable X and variable Y are. In a study where X is gender and Y is weight, what correlation coefficient might you use?

Pearson r
Kendall’s Tau
Point-Biserial
Phi

Explanation

Answer: C - Point-Biserial correlation coefficient is the best choice for analysis of this data. X is a true dichotomy variable (there are two possible answers), and Y yields ratio data (numerical values with an absolute zero); this correlation coefficient is indicated when one variable is a true dichotomy and one is either interval or ratio data.

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