determine whether the study depicts an observ...

determine whether the study depicts an observational study or an experiment. athletes are randomly divided into two groups. one group trains using weight resistance; the other trains using cardio. after 2 months, each group completes a fitness test to compare agility. choose the correct description of the study. a. the study is an experiment because the study examines individuals in a sample, but does not try to influence the variable of interest. b. the study is an observational study because the study examines individuals in a sample, but does not try to influence the variable of interest. c. the study is an observational study because the researchers control one variable to determine the effect on the response variable. d. the study is an experiment because the researchers control one variable to determine the effect on the response variable.

Answer

# Brief Explanations: In an experiment, researchers manipulate an independent variable (here, type of training - weight resistance or cardio) to see its effect on a response variable (agility). In an observational study, no such manipulation occurs. Since the athletes are divided into groups with different training methods (a controlled variable), it's an experiment. # Answer: D. The study is an experiment because the researchers control one variable to determine the effect on the response variable.