Designing an Experiment Researchers wish to know if there is a link between hypertension (high blood pressure) and consumption of sugar. Past studies have indicated that the consumption of fruits offsets the negative impact of sugar consumption. It is also known that there is quite a bit of person-to-person variability as far as the ability of the body to process and eliminate sugar. However, no method exists for identifying individuals who have a higher ability to process sugar. It is recommended that daily intake of sugar should not exceed 5700 milligrams (mg). The researchers want to keep the design simple, so they choose to conduct their study using a completely randomized design. Complete parts (a) through (c).

(a) What is the response variable in the study?

(b) Name three factors that have been identified.

(c) For each factor identified, determine whether the variable can be controlled or cannot be controlled.