Dr. klaus conducted a research in psychology that established that the number of hours of study before a test is directly proportional to the performance in the test. in the context of correlational research, it can be said that exists between the two variables.

It can be said that a positive correlation existis between the two variables.

Explanation:

Correlational research looks for an existing relationship between two variables, when there is a relation it can be either positive or negative. Negative correlation is when the variables move in opposite directions, when one of them increases, the other one decreases. A positive correlation existis when both variables move in the same direction, meaning that when one variable increases the other one also increases.

In this case, Dr. Klaus found a positive correlation because he found that when the number of hours of study increased, the performance of the test did also.

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)

would it be plagiarism to copy and paste off of here? ?