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.
How long does it take to become a therapist involves several years of study. You have to complete a bachelorâs degree then proceed to your post graduate course where you can take your masterâs degree and even pursue the doctoral level.