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Surveys are standardized to ensure reliability, generalizability and validity (see quantitative marketing research ). Surveys are a mixture of science and art, and a good researcher will save many times its cost by knowing how to ask the right questions. Surveys are flexible in the sense that a range of information may be collected.A survey may focus on opinions or factual information depending on its purpose, and many study s include administering questions to individuals. Polls are serial repeat the same questions at different points in time, production time series data. Structured surveys, particularly those with closed questions may have little validity when researching affective variables.
There are several uses of the word survey, in relation to two main meanings: surveys to determine the position of the elements or fixed points on Earth and beyond, as astronomical surveys , Studies of birds, and the wide field of surveying, and statistical surveys to estimate the number of people or other items, such as animals, organizations, or messages. Statistical surveys are more focused on the establishment of the numbers or proportions of the elements in their position. Sample surveys collect information on only a sample of the population, unlike censuses... Readmore