Sampling Techniques

RANDOM GROUP METHOD -Ruchika Lalla OVERVIEW OF RANDOM GROUP METHOD Sample Survey Design is an integral aspect of Statistical Analyses. While designing a sample survey, it is also equally important to choose a suitable method of variance estimation. The Random Group Method is a form of replicate variance estimation. This method consists of drawing a number of samples (sub-samples) from the population, estimating the parameter of interest for each sub-sample and assessing its variance based on the deviations of these statistics from the corresponding statistic derived from the union of all the sub-samples. [1] Historically, this was one of the first techniques developed to simplify variance estimation for complex sample surveys. It was introduced in jute acreage surveys in Bengal by Mahalanobis, who called the various samples interpenetrating samples. [2] ADVANTAGES AND DISADVANTAGES OF RANDOM GROUP METHOD The advantages of this method are given as – requiring no separate the...