Suppose one runs the regression of Y on X1 and X2 and the coefficient on X2 is positive. Which of the following correlation conditions must hold in the sample?

A. Y and X2 have a positive unconditional correlation.
B. Y and X1 have a positive unconditional correlation.
C. The partial correlation between Y and X2 holding X1 constant must be positive.
D. The semi-partial correlation between Y and X2 holding X1 constant must be positive.


Answer: D

Biology & Microbiology

You might also like to view...

Speciation:a

maintains an intermediate phenotype in a stable environment. b. is the formation of a new species from an ancestral population. c. only occurs when a population is geographically isolated. d. is a change in allele frequencies in a population. e. is the end result of macroevolution but not microevolution.

Biology & Microbiology

All protists are unicellular organisms

Indicate whether the statement is true or false

Biology & Microbiology

Refer to the accompanying figure. Which structure is specialized to receive stimuli from other neurons and to send

signals to the cell body? a. 1 b. 4 c. 6 d. 7 e. 9

Biology & Microbiology

What is the role of adenosine triphosphate (ATP) within a cell?

A) use glucose B) biological molecule that stores energy C) release carbon dioxide D) controls chemical reactions

Biology & Microbiology