Find a 90 Percent Confidence Interval for the Difference Between

Multiple Choice

Find a 90 percent confidence interval for the difference between the proportions of Group l and Group 2.Let p₁ represent the population proportion of the people in group 1 who are in favor of new packaging and Let p₂ represent the population proportion of the people in group 2 who are in favor of new packaging,where ₁ = .21, ₂ = .13,n₁= 300,n₂ = 400.

A) (.0472 .1128)
B) (.0510 .1090)
C) (.0232 .1368)
D) (.0324 .1276)