Sampling Methods Question Disappeared

Thanks John.

The question is from BPP’s Revision Kit and reads as follows:

“Which of the following sampling methods require a sampling frame?
(i) Random
(ii) Stratified
(iii) Quota
(iv) Systematic”

The answer in the textbook is (i), (ii) and (iv) without much of an explanation.

I agree that (i) and (ii) require sampling frames; however, with systematic sampling, I understood that one only needed to know the size of the total population so that one could calculate an appropriate sample size and then decide on a starting point from which sample members would be selected at every sampling interval until the sample size was met. I don’t understand why this process would need a list of every member of the population?

I understand.

I pictured a survey scenario in a public place where every nth person is stopped at an entrance/exit to complete the survey.

I suppose a more relevant way would be to think of data about a population on a spreadsheet and having to complete the exercise.

Thanks for clarifying John!