A market research company wants to understand the shopping preferences of adults in a city.. They decide to conduct a survey and use the following approach: First , they divide the city into different neighborhoods . Then, they randomly select five neighborhoods . Within each selected neighborh ood, they survey all adults. Which type of sampling technique is being used in this scenario? a. Simple Random Sampling b. Stratified Sampling c. Cluster Sampling d. Systematic Sampling

The correct answer is c. Cluster Sampling.<br /><br />In this scenario, the market research company is using a cluster sampling technique. Cluster sampling involves dividing the population into different clusters, then randomly selecting some of these clusters. Within each selected cluster, all members are surveyed. In this case, the city is divided into different neighborhoods, which act as the clusters. Five neighborhoods are randomly selected, and all adults within these selected neighborhoods are surveyed. This is a common technique used when it is more cost-effective or convenient to sample entire groups or clusters rather than individuals within the population.