Identify the type of sampling used (random, systematic, convenience, stratified,

Question

Identify the type of sampling used (random, systematic, convenience, stratified, or cluster sampling) in the situation described below.

A

womanwoman

experienced a tax audit. The tax department claimed that the

womanwoman

was audited because

everyevery

1000 th1000th

personperson

onon

thethe

taxpayertaxpayer

listlist

waswas

beingbeing

audited.audited.

nothing

nothing

Which type of sampling did the tax department use?

ClusterCluster

sampling

StratifiedStratified

sampling

RandomRandom

sampling

SystematicSystematic

sampling

ConvenienceConvenience

sampling

Explanation / Answer

The kind of sampling done here is a systematic sampling. In this method members from a large sample population(here the sample data are the taxpayers on the taxpayers list). The sample has a random starting point (it is not neccessary that the 1st person on the list has to be chosen, it may be the 5th, 12 or 100th person who is chosen as the starting point), but has a fixed interval, called the sampling interval. Here the sampling interval is every 1000th person.

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