Final answer:
The sampling method used in this study was systematic sampling.
Step-by-step explanation:
In the given case, the sampling method used in this study was systematic sampling. Systematic sampling is a statistical method where every nth item in a population is selected for inclusion in a sample. It is used to achieve a representative sample in a systematic and efficient manner, simplifying the sampling process and often yielding results comparable to more complex sampling techniques.
Thus, systematic sampling involves selecting every nth element from a population. In this case, the first house was randomly selected, and then every eighth house in the neighborhood around the park was interviewed. This method ensures that every house in the neighborhood has an equal chance of being selected for the study.