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Chapter 11 Systematic Sampling - IIT Kanpur

Chapter 11. Systematic Sampling The Systematic Sampling technique is operationally more convenient than the simple random Sampling . It also ensures at the same time that each unit has equal probability of inclusion in the sample. In this method of Sampling , the first unit is selected with the help of random numbers and the remaining units are selected automatically according to a predetermined pattern. This method is known as Systematic Sampling . Suppose the N units in the population are numbered 1 to N in some order. Suppose further that N is expressible as a product of two integers n and k , so that N = nk.

Comparison with stratified sampling: The systematic sample can also be viewed as if arising as a stratified sample. If the population of Nnk units is divided into n strata and suppose one unit is randomly drawn from each of the strata. Then we get a stratified sample of size n. In doing so, just consider each row of the following arrangement as a

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