Several Volunteers Engage in a Special Exercise Program Intended to Lower

Multiple Choice

Several volunteers engage in a special exercise program intended to lower their blood pressure. We measure each person's initial blood pressure, lead them through the exercises daily for a month, then check blood pressures again. To see if the program lowered blood pressure significantly we should do a

A) matched pairs t-test
B) ç² test of homogeneity
C) 2-sample t-test
D) linear regression t-test
E) ç² goodness-of-fit test