Introduction to Sampling Theory Population and Random Sample Population and Random Sample Statistical analysis is based on outcomes of a large number of repeated random experiments of same or similar kind. Suppose a random variable Xi denotes the outcome of the i-th experiment.We then obtain a sequence of out- comes,X1,...,Xn,if n experiments are implemented. .This sequence of outcomes then constitutes a so-called random sample from which one can make inference of the underlying probability law which has generated the observed data. Introduction to Sampling Theory Introduction to Statistics and Econometrics April 16,2020 3/167Introduction to Sampling Theory Introduction to Sampling Theory Introduction to Statistics and Econometrics April 16, 2020 3/167 Population and Random Sample Population and Random Sample