The researchers from Exercise 1 want to test if the proportions of foreign born are the same in the United States and Canada. What is the appropriate standard error to use for the hypothesis test?
a) What is the difference in the proportions of foreign born residents in both countries?
b) What is the value of the z-statistic?
c) What do you conclude at a = 0.05?

Data From Exercise 1

Suppose an advocacy organization surveys 960 Canadians and 192 of them reported being born in another country (www.unitednorthamerica.org/simdiff.htm). Similarly, 170 out of 1250 U.S. citizens reported being foreign-born. Find the standard error of the difference in sample proportions.