Introduction to Sampling Theory Population and Random Sample Population and Random Sample Definition 1(6.1).[Random Sample] A random sample,denoted as X"=(X1,..,X),is a sequence of n random variables X1,...,Xn. A realization of the random sample X",denoted as x"= (1,,n),is called a data set generated from X"or a sample point of Xr. A random sample Xm can generate many different data sets. The collection of all possible sample points of X"constitutes the sample space of the random sample X". Introduction to Sampling Theory Introduction to Statistics and Econometrics April 16,2020 4/167Introduction to Sampling Theory Introduction to Sampling Theory Introduction to Statistics and Econometrics April 16, 2020 4/167 Definition 1 (6.1). [Random Sample] Population and Random Sample Population and Random Sample