Identify the sampling technique used. A community college student interviews everyone in a statistics class. What is the difference between an observational study and an experiment? Name all levels of measurement for which data can be qualitative. Identify the sampling technique used. Five statistics classes are randomly selected, and all students from those classes are interviewed. Identify the sampling technique used. A university surveys 11,000 alumni from 46,500 questionnaires. Identify the sampling technique used. A researcher interviews all passengers on five randomly selected flights. Identify the data set's level of measurement. Annual salaries for all teachers in a particular state