Question STEP 1: Demonstrate your understanding of correlation and regression. Does correlation (association) imply causation? What is used to determine whether a linear model is a good summary of the relationship between the explanatory and response variables? When the form of a relationship is linear, what is used to measure the  strength and direction of the relationship? What two numeric measures help us judge how well the regression line  models the data? STEP 2: Apply this knowledge to the research study you proposed in the week one discussion. How can you use correlation in your research study? What do you predict will be the outcome?