Step function

In mathematics, a function on the real numbers is called a step function (or staircase function) if it can be written as a finite linear combination of indicator functions of intervals. Informally speaking, a step function is a piecewise constant function having only finitely many pieces. The graph...

By: Unknown On 07:45

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Cluster vs. Stratum

Cluster sampling and stratified sampling are two different sampling methods. The main difference between them is that a cluster is treated as sampling unit. Hence, in the first stage, analysis is done on a population of clusters. In stratified sampling, the elements within the strata are analysed. Cluster...

By: Unknown On 07:43

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