A Study Was Recently Conducted at a Major University to Estimate

Multiple Choice

A study was recently conducted at a major university to estimate the difference in the proportion of business school and non-business school graduates who go on to a higher degree program within five years of graduation. A random sample of 400 business school graduates showed that 75 had gone to graduate school, while in a random sample of 500 non-business graduates, 137 had done so. The 95% confidence interval is

A) -0.1412 to -0.0318.
B) -2.0465 to 1.8375.
C) -0.0880 to -0.0850.
D) -0.1144 to -0.0586.
E) -0.0873 to -0.0857.