A public health researcher wants to study the prevalence of a certain disease in a large city.. To ensure they have a representative sample, they divide the city into different regions based on socioecon omic status (low,middle, and high income). Then , they randomly select a proportion al number of individuals from each socioeconc mic group to participate in the study. Which type of sampling technique is being used in this scenario? a. Simple Random Sampling b. Stratified Sampling c. S ystematic Sampling d. Cluster Sampling

Question

A public health researcher wants to study the prevalence of a certain disease in a large city.. To ensure they have a representative sample, they divide the city into different regions based on socioecon omic status (low,middle, and high income). Then , they randomly select a proportion al number of individuals from each socioeconc mic group to participate in the study. Which type of sampling technique is being used in this scenario? a. Simple Random Sampling b. Stratified Sampling c. S ystematic Sampling d. Cluster Sampling

Answer 1

The correct answer is b. Stratified Sampling.In this scenario, the researcher is dividing the city into different regions based on socioeconomic status (low, middle, and high income). This is known as stratification. Then, they are randomly selecting a proportional number of individuals from each socioeconomic group to participate in the study. This is the key characteristic of stratified sampling, where the population is divided into subgroups (strata) and a sample is taken from each subgroup.

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