Collecting data from samples is the most critical part of effective statistical analysis. A survey is one of the common methods of data collection. Here, few individuals are drawn from the target human population, and information is obtained about their experience, opinion, or knowledge of a product, service, or process. The responses are recorded and interpreted. For example, consider a new perfume being introduced into the market. A survey is conducted asking participants to rate the scent on a scale of 0 to 10, with zero indicating they hate it and ten that they love it. The responses are pooled to conclude how well the market will receive the perfume. Standard survey methods are face-to-face interactions, written questionnaires, focus groups, or telephone interviews. Surveys are commonly used to obtain customer feedback on products and services, evaluate the progress in a project, assess consumer expectations, or obtain employee satisfaction.