# Question

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?

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