Question

question 4 of 10
what must be present in order to say that a correlation exists?
a. a wish to identify cause and effect
b. a desire for change
c. a relationship between variables
d. an opinion that things are the same

Explanation:

Correlation is about the relationship between variables. It doesn't imply cause - effect (so A is wrong). A desire for change (B) or an opinion that things are the same (D) has no relation to the definition of correlation. By definition, correlation exists when there is a relationship between variables.

Answer:

C. A relationship between variables