A candidate for one of Ohio's two U.S. Senate seats wants to compare her support among registered voters in northern half of the state with her support among registered voters in southern half of the state. A random sample of 2000 registered voters in the northern half of the state is chosen, of which 1062 support the candidate. Additionally, a random sample of 2000 registered voters in southern half of the state is chosen, of which 900 support the candidate.
For purposes of comparing the two proportions, the sampling distribution for the difference in the sample proportions has standard error
A. 0.300.
B. 0.022.
C. 0.016.
D. 0.0002.