In computing a correlation coefficient, if both variables are measured on at least an interval scale, then the appropriate coefficient is
A) A Pearson product-moment correlation coefficient.
B) A multiple correlation coefficient.
C) A Spearman rank-order correlation coefficient.
D) A canonical correlation coefficient.
Question 2
A variable that seems to change the relationship between other variables is termed
A) A potentiating variable.
B) A mediating variable.
C) A moderator variable.
D) A catalytic variable.
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