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.
Undergraduate Studies. Before you begin formal training in graduate school to become a therapist, you will have to finish a bachelor's degree at a college or university. A major in a field such as psychology or social work can give you the strong background you will need to excel in graduate school.aster's Degree. Your master's degree is where you will get the specialized training you need to become a licensed therapist. You will likely take classes in interpersonal, group, family, and child psychology, as well as classes on ethics in therapy, psychological theories, research methods, and clinical best practices.