A researcher wants to determine if Republicans and Democrats differ in their attitudes about the war in Iraq. He identifies a set of 7 Republican students and matches each student with a Democrat on the basis of age, family income and race. The researcher then asks each student to complete a questionnaire, where higher scores represent a "pro-war" attitude. What is the appropriate test for this data?

Republicans	Democrats
60	45
70	50
75	55
65	40
80	50
70	45
70	60

Group of answer choices

Independent samples t, two tailed

Independent samples t, one tailed

Paired-samples t, 2 tailed

Paired-samples t, 1 tailed