Random samples are used in population sampling situations when reviewing historical or batch data. The key to random sampling is that each unit in the population has an equal probability of being selected in the sample.
Individuals pursuing a career as an occupational therapist usually need to earn a post-baccalaureate degree from an accredited college or university or education deemed equivalent.  Education and training. A master's degree or higher in occupational therapy is the minimum requirement for entry into the field.
To become a physical therapist, one must complete an accredited physical therapy program, many of which culminate in a doctorate degree, and earn state licensing. A residency program in sports medicine can train physical therapists to specialize in helping athletes, including preventing and treating injuries, and even enhancing performance.