ignment A college dean obtains an alphabetical list of all full-time students at her college and she selects every 18th name on that list and surveys those students to find the amount of student debt incurred by each of them. She uses the results to estimate the average (mean) amount of student debt incurred by college students in the United States. What type of sampling is used? O Systematic sampling O Convenience sampling Stratified sampling O Simple random sampling O Cluster sampling