A newsmagazine asks 1200 students what college they attend, and how many times per week they attend a party where alcohol is served. The news magazine determines the mean number of parties per week for each school, and publishes a ranking of the nation's top ten party schools.
I. What is the population?
II. What is the sample?
III. Is the study observational or experimental? Justify your answer.
IV. What are the variables?
V. For each of those variables, what level of measurement (nominal, ordinal, interval, or ratio) was used to obtain data from these variables?