To sample residents of registered nursing homes in Yorkshire, UK, I construct a list of all nursing homes in the county, which I number from 1 to 110. Beginning randomly, I choose every 10th home on the list, ending up with 11 homes. I then obtain lists of residents from those 11 homes, and I select a simple random sample from each list. What kinds of sampling have I used?

For multiple-choice questions 2.34–2.37, select the best response.