Question: Identify the sampling method that was used for each of the following (choose from simple random, stratified, cluster, systematic, or convenience): (1 pts each)

a. A student at Southern State University selects the first 25 students she encounters at the University Cafeteria to interview for her research project.

b. A professor is conducting a survey of students taking an introductory statistics. Every student is assigned a number. The professor then uses a Excel to generate ten random numbers and surveys the students associated with those numbers.

c. From a list of 10,000 possible subjects, a researcher selects the 5th name at random and then selects every 10th name thereafter. The names selected are included in the sample.

d. The student body of a large law school is comprised of 3 groups: 35% local residents, 25% non-local in-state residents, and 40% out-of-state residents. A research team randomly selects 70 local alumni, 80 non-local in-state alumni, and 50 out-of-state alumni.