<Li> Physical randomization devices such as coins, playing cards or sophisticated devices such as ERNIE </Li> <P> Random sampling by using lots is an old idea, mentioned several times in the Bible . In 1786 Pierre Simon Laplace estimated the population of France by using a sample, along with ratio estimator . He also computed probabilistic estimates of the error . These were not expressed as modern confidence intervals but as the sample size that would be needed to achieve a particular upper bound on the sampling error with probability 1000 / 1001 . His estimates used Bayes' theorem with a uniform prior probability and assumed that his sample was random . Alexander Ivanovich Chuprov introduced sample surveys to Imperial Russia in the 1870s . </P> <P> In the USA the 1936 Literary Digest prediction of a Republican win in the presidential election went badly awry, due to severe bias (1). More than two million people responded to the study with their names obtained through magazine subscription lists and telephone directories . It was not appreciated that these lists were heavily biased towards Republicans and the resulting sample, though very large, was deeply flawed . </P>

What are the types of sampling in statistics