You think that concern over school shootings differs based on citizenship of the person you are asking as well as their age. The high schools in the United States area began compulsive training in case of an active shooter situation about 10 years ago so you feel that people who have attended these seminars (i.e. those from the United States) will be more aware and thus more concerned than Canadians. You asked 100 U.S. citizens and 100 Canadian citizens who live similar sized cities to rate their concern about potential school shootings on a scale of 1 to 100 with higher numbers being of greater concern. You also divide your group into older and younger participants based on whether they are over the age of 45 or under the age of 20.

a) Indicate the most appropriate statistical test for this situation.

b) Indicate why that particular test is the most appropriate.

c) Is this a study or an experiment? Explain.