THE OTHER APPLICATION AREA OF SURVEY SAMPLING

摘要

The law of large numbers and the central limit theorem (in its various forms) lead to a number of useful formulas (statistics) that can be rearranged for confidence intervals and then solved for the attendant sample size formulas as desired. These formulas are useful in surveying large populations (by market researchers, scientists and engineers, etc.) because one does not need a significant percentage sample of a large population to obtain useful information about the large population being studied. Many times samples of a few thousand (even if the population size is a hundred million or even infinite) will be adequate. An example or two of this type of survey sampling will be presented.