2. TYPES OF STUDIES [1]:Forty 60-65-year-old males have agreed to participate in an eight-week study of the effectiveness of four weight/cardio training approaches on overall retention of muscle mass. At the start of the investigation the researcher calculates the muscle circumference in the upper thigh and the upper arm and calculates a body mass index (BMI) for each participant. Each participant is then randomly assigned to one of the four weight/cardio training approaches. The muscle circumference and BMI measurements are taken again at the end of the study. [sp20]

2A)This is an example of a/an: A) Experiment B) Observational Study C) Simulation

2B)What is the objective (response) variable for this study? (What are they investigating?)

A) Body mass B) Weight/Cardio programs C) Weight loss D) Muscle mass retention