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.
Education and Training. All therapists must begin by getting a bachelorâs degree. Many therapists will obtain bachelorâs degrees in psychology, but others will begin in different liberal arts fields for their bachelorâs degree and then shift to therapy or counseling for their graduate work. Beyond the bachelorâs degree, therapy training is diverse.