The questionnaire contained the questions that revealed the respondents’ information on age, gender, and performance as well as the alcohol intake and its frequency.
For example, if a scholar were interested in the average class size of elementary schools in Spain, he or she might design a survey asking about the number of students and the number of classrooms (possibly among other variables) and send that survey to every elementary school in Spain.
That researcher might also be interested in describing patterns of class sizes across different countries and parts of the world.
With this purpose, it will be conducted the qualitative and quantitative research, which allows gaining the most relevant results about the relations between the alcohol use and the school performance.
The respondents of this study are the students of two high schools, which were selected with no regards to their addiction or non-addiction to the alcohol use.