If we collect information on students' study practices and exam scores, and we find strong evidence of a positive association between studying less than two hours a night and earning higher grades, for which case could we feel the most confortable generalizing these findings to the general student population? The students participated in the study after seeing signs about the survey posted around campus. The signs were posted in every campus building, and so all students would see these signs and have the opportunity to participate. Therefore, all students are represented. O A student list for the college was obtained and students were randomly selected from the list to participate. Q There is at least one student from each degree program offered by the college