A sandwich shop owner wants to survey customers about new menu options. To get the sample, the owner surveys the 4th customer of the day (with 4 being a randomly chosen value), then surveys every 10th customer after that. Which sampling method was used?

The owner randomly chooses a starting position—the 4th customer—then surveys customers at a regular interval, every 10th person. Selecting a random starting point and then taking every nth member is systematic random sampling. Thus, the method is systematic random sampling.

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