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?