Which of the following would be difficult to explore using a census? a) You are interested in the difference in performance on the AP Statistics exam for students taught by two different teachers.

b)You want to know the proportion of homes in a suburban community that have wireless Internet access.

c) You want to know the average amount of time spent on homework by students in your school.

d)You want to know the proportion of trees in a large state forest that are infected with Dutch Elm disease.

e) You wish to know the proportion of teacher in a school district that have a Master’s degree.