Can changing diet decrease high blood pressure? A vegetarian diet as well as a low-salt diet are both promising. Blood pressure is measured upon two hundred men with high blood pressure. Then such men are assigned at random to one of four diets with 50 men assigned to each diet: Normal diet with unrestricted salt, vegetarian with unrestricted salt, Normal with restricted salt, and vegetarian with restricted salt. After 8 weeks, blood pressure is measured again on each man and their change in blood pressure is recorded.
What is the response variable in this experiment?
A.the amount of salt in the subject's diet
B.the diet a subject is assigned to
C.change in blood pressure after 8 weeks in the assigned diet
D.cannot be determined because there in insufficient information