A meta-analysis found a negative correlation between birth weight and blood pressure later in life (Mu et al., 2012).

a. Explain what is meant by a negative correlation between these two variables.

b. If you were to examine these two variables with simple linear regression instead of correlation, how would you frame the question? The research question for correlation would be: Is birth weight related to blood pressure?

c. What is the difference between simple linear regression and multiple regression?

d. If you were to conduct a multiple regression instead of a simple linear regression, what other predictor variables might you include?