For each study description below, identify both the population of interest and the sampling technique used: a. University administrators want to determine the frequency of underage drinking at their...

For each study description below, identify both the population of interest and the sampling technique used:

a. University administrators want to determine the frequency of underage drinking at their school. They randomly select students from the registration records to send an anonymous survey to, with the percentages of men and women in the sample equal to the percentage of men and women at that university.

b. A researcher is interested in mimicking behaviors that affect cooperation in a task. Psychology students from the participant pool are recruited to answer questions in the presence of a confederate (a researcher pretending to be a participant) who mimics the participants’ body postures during the questioning. Then the participants are asked to work with the confederate to complete a task that requires that they work together. The amount of time taken to complete the task is measured.