Research on fear appeal in advertising suggests that a moderate amount of fear is most effective at achieving persuasion. That is, using not enough fear or too much fear in advertising will not be effective. This is an example of what type of relationship that regression might find?

a. positive linear
b. negative linear
c. curvilinear
d. no relationship
e. none of these

c. curvilinear                                                        

Explanation:

Curvilinear relationship: In statistics, the term "curvilinear relationship" is described as one of the types of relationship that exists between two different variables wherein if one variable increases then the other variable will increase as well, yet only up to a specific point, after that one variable will continuously increase and hence the other variable will decrease.

In the question above, the given statement is an example of a curvilinear relationship.

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;

the correct answer on edgen is:

(c.) prevent the spread of communism.

i just took the test.