If there is a consistent relationship between two variables such that Y tends to decrease each time X decreases,but not a linear relationship,then which correlation is designed to measure the consistency of the relationship?
A)a partial correlation
B)a Spearman correlation
C)a point-biserial correlation
D)a phi-coefficient

Question

If there is a consistent relationship between two variables such that Y tends to decrease each time X decreases,but not a linear relationship,then which correlation is designed to measure the consistency of the relationship?
A)​a partial correlation
B)​a Spearman correlation
C)a point-biserial correlation
D)​a phi-coefficient

Quizplus · Accepted Answer

A Spearman correlation measures the consistency of the relationship between two variables that may not have a linear relationship. It measures the degree to which the ranks of the two variables are correlated. Therefore, it would be the best choice to measure the consistent relationship between two variables when one tends to decrease each time the other decreases, but not in a linear fashion.

If There Is a Consistent Relationship Between Two Variables Such