Stratified sampling

Stratified sampling is a method used to ensure that a sample represents different groups within a population. Imagine you want to survey opinions about a new product, and your group includes teenagers, adults, and seniors. Instead of randomly selecting people, you separate them into these age categories (strata) and then randomly choose individuals from each group. This way, you ensure that each age group is represented in your survey, leading to more accurate and reliable results about the overall population's opinions. It helps capture diversity and reduces bias in the data collected.