Acollege professor wants to know if the university students in the unites states will find the new textbook that he has authored to be interesting and useful. he chooses all marketing majors at the school he teaches as his sample. he believes that this group of students will be representative of the university student population in the united states. in this scenario, the professor is most likely using:

The professor is most likely using "judgment sampling".

Judgmental sampling is a non-likelihood inspecting method where the scientist chooses units to be tested in light of their insight and expert judgment. This sort of testing procedure is otherwise called purposive sampling and authoritative sampling.
Purposive sampling is utilized as a part of situations where the claim to fame of an expert can choose a more illustrative example that can bring more precise outcomes than by utilizing other likelihood examining strategies. The procedure includes only intentionally handpicking people from the population in view of the expert's or the analyst's information and judgment.