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.
These therapists usually have a bachelorâs degree in recreational therapy; and, less common, an associateâs degree. To become a recreational therapist requires coursework in assessment, human anatomy, medical terminology and characteristics of illnesses and disabilities is required.