A university wants to understand the study habits of its first-year students. A simple random sample of 200 first-year students was selected, and they were asked to complete a detailed questionnaire. Based on this survey, to which of the following populations can the findings be most reliably applied?
The 200 first-year students who completed the questionnaire.
All first-year students at that university.
All students at that university (including upperclassmen).
All first-year university students in the country.
