Under Which of the Following Conditions Should One NOT Use

Multiple Choice

Under which of the following conditions should one NOT use Pearson correlation coefficient?

A) When the researcher wants to determine if two variables have a linear relationship
B) When the researcher wants to determine if two variables have a curvilinear relationship
C) When the two variables have been measured using interval scales
D) When the two variables have been measured using ratio scales
E) When the two variables come from a bivariate normally distributed populations