14.34 Birth weight, blood pressure, and regression: A metaanalysis 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? (Hint: 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?