A Dutch study implies that exercising before eating protein might help the body convert more of the protein into muscle. In the study, 48 men were randomly assigned to either exercise or rest for 30 minutes. At the end of the 30 minutes, all drank a protein shake and had their muscle-protein synthesis measured. Regardless of age, exerciser’s bodies converted more of the protein to muscle than the resting bodies.
(a) What is the sample? What is a reasonable population?
(b) What are the variables? Include all variables mentioned in the description.
(c) Identify all variables as either categorical or quantitative.