Jake, a researcher, measures the levels of testosterone in a…

Jake, a researcher, measures the levels of testosterone in adult males who tend to be highly aggressive. He believes hormone levels are the single-most prominent cause of male aggression. In this scenario, Jake is most likely using the ________ approach in his study.

Professor Izadi is interested in determining the association…

Professor Izadi is interested in determining the association between sleep and cognitive performance. He surveyed his students about the number of hours they slept the night before an exam and then correlated these scores with their test grades. He found a +.81 correlation between these two variables. What does this result mean?