# Question: Suppose that you correlate AGE with SBP systolic blood pressure

Suppose that you correlate AGE with SBP (systolic blood pressure) and find a strong positive correlation. Next you compute a first order partial correlation between AGE and SBP controlling for WEIGHT (body weight).

a. what would you conclude if this partial r were almost exactly zero?

b. What would you conclude if this partial r were a little smaller than the zero order r between AGE and SBP, but still substantially larger than zero?

c. What would you conclude if the zero order r and the partial r for these variables were essentially identical?

a. what would you conclude if this partial r were almost exactly zero?

b. What would you conclude if this partial r were a little smaller than the zero order r between AGE and SBP, but still substantially larger than zero?

c. What would you conclude if the zero order r and the partial r for these variables were essentially identical?

**View Solution:**## Answer to relevant Questions

Consider the following hypothetical data (in the file named pr1_mr2iv.sav) The research question is: How well can Systolic Blood Pressure (SBP) be predicted from Anxiety and Weight combined? Also, how much variance in blood ...For a regression (to predict Y from X1 and X2), is it possible to have a significant R, but non significant b coefficients for both X1 and X2? If so, under what circumstances would this be likely to occur? Write out equations to show how regression can be used to duplicate a t test or a one-way ANOVA. How is a weighted average of group means, different from an unweighted average of group means? What is the “weighting” factor? Under what circumstances would each type of mean be preferred? What is the general path diagram for multiple regression?Post your question