In calculating the Pearson correlation coefficient, we assume that:
A. when the correlation coefficient is weak, there is a consistent, systematic relationship between the two variables.
B. the relationship we are trying to measure is curvilinear.
C. the variables we want to analyze have a binomially distributed population.
D. when the correlation coefficient is strong and significant, the two variables are associated in a curvilinear fashion.
E. the variables have been measured using interval- or ratio-scaled measures.
Answer: E
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