When it comes to correlational and regression studies, there are weakness and strengths. The strength of a correlational study is the ability to measure the association between two variables, but has a weakness in determining the causation. This means that there may be too many cofounding variables that can influence the variables. When we look at regression studies and the strength of this study is that it provides the weakness that regression studies have is that outliers impact the outcome of these studies significantly. A correlation coefficient is a number between -1 and 1 that describes the relationship between the two variables being observed, which can help provide you with information on the strength of the causation. We can see a negative correlation when the two variables move in different directions, meaning as one increases, the other decreases. The positive correlation occurs when both variables increase or decrease together