researchers-want-to-study-the-effects-of-different-exercise-routines-on-muscle-s

Question

Researchers want to study the effects of different exercise routines on muscle strength. To conduct the experiment, they recruit $120$ volunteers and plan to assign them to one of three groups, including a control group. How can they design this experiment using a completely randomized design?

Accepted Answer

Randomly assign all participants to the exercise groups without considering any characteristics

Answer

Group participants based on age before assigning them to exercises

Answer

Allow participants to choose the exercise routine they prefer

Answer

Assign the most active participants to the most intense exercise group

Researchers want to study the effects of different exercise routines on muscle strength. To conduct the experiment, they recruit 120120 volunteers and plan to assign them to one of three groups, including a control group. How can they design this experiment using a completely randomized design?

Researchers want to study the effects of different exercise routines on muscle strength. To conduct the experiment, they recruit $120$ volunteers and plan to assign them to one of three groups, including a control group. How can they design this experiment using a completely randomized design?