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.
Essential Information. Physical therapists work with patients to help them retrain injured or debilitated muscles by moving, stretching and strengthening various parts of the body. To become a physical therapist, a person must obtain a professional degree, usually a doctorate in physical therapy.earn about the education and preparation needed to become a physical therapist. Get a quick view of the requirements as well as details about degree programs, job duties and licensing to find out if this is the career for you. View 10 Popular Schools Â».