A variable is exogenous if that variable:
A. has no effect on the treatment variable beyond the combined effects of other variables already in the determining function.
B. has a strong correlation with the weather.
C. has no effect on the outcome variable beyond the combined effects of other variables already in the determining function.
D. is uncorrelated with the residuals of a regression estimated by OLS.
Answer: C
You might also like to view...
In Hutchinson-Gilford progeria, which
organelle is affected?
a. lysosomes b. mitochondria c. Golgi bodies d. nuclei e. rough endoplasmic reticula
In , bacteria return nitrogen to the atmosphere by converting nitrates to N2.
A. denitrification B. respiration C. nitrification D. transpiration E. nitrogen fixing
Which of these does cellular respiration do?
A. releases energy and reduces water B. oxidizes glucose and reduces oxygen C. oxidizes oxygen and reduces glucose D. releases energy and oxygen E. requires energy and releases NADH
When the substrate is bound to the enzyme, the shape of the enzyme may change slightly, leading to
A. an induced fit. B. more possible products of the reaction. C. more permanent binding through intimate total contact. D. a great range of possible catalytic activities. E. a greater supply of activation energy.