Sampling Techniques

Author : Jayashree Jadhav S (2048125) Sequential sampling is a non-probability sampling technique wherein the researcher picks a single or a group of subjects in a given time interval, conducts his study, analyses the results then picks another group of subjects if needed and so on. This  sampling technique  gives the researcher limitless chances of fine tuning his research methods and gaining a vital insight into the study that he is currently pursuing In sequential sampling, a sequence of one or more samples is taken from a group. Once the group has been sampled, a hypothesis test is performed to see if you can reach a conclusion. If you can’t, the whole procedure is repeated. A characteristic feature of sequential sampling is that the sample size is not set in advance, because you don’t know at the outset how many times you’ll be repeating the process. Difference of Sequential Sampling from All Other Sampling Techniques If we are to consider all the other sampli...

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...