What correlation coefficient measures the linear relationship between two interval- and/or ratio-scaled variables(scale variables)such as those depicted conceptually by scatter diagrams?
A)Kendall rank correlation
B)Spearman correlation
C)Pearson product moment correlation
D)Rank-Biserial correlation

Question

Quizplus · Accepted Answer

Pearson product moment correlation measures the linear relationship between two interval- and/or ratio-scaled variables, which is exactly what is being asked for in the question. The other options are used to measure the correlation between different types of variables (e.g. Kendall rank correlation for ordinal variables, Spearman correlation for non-parametric data, and Rank-Biserial correlation for one variable that is dichotomous and the other is continuous).

What Correlation Coefficient Measures the Linear Relationship Between Two Interval-