Disadvantages of Systematic
Sampling:
·
Effect of
Periodicity: When there is hidden periodicity in the population or a
cyclical or periodic movement of the data the systematic sample is less
representative than the simple random sample.
·
Effect of
Trend: When there is a monotonic trend in the population elements,
a systematic sample will perform less well.
·
Effect of
Ordering: A major limitation of systematic sampling is that unless
some assumption is made about the ordering of the list, the variability among
the values of the sampled elements does not provide a basis for estimating the
variability of the sampling distribution.
Applications of Systematic
Sampling:
·
In Gallup Poll: Systematic
sampling is a common sampling design in many opinion surveys.
·
In Quality
Control: The systematic sampling is extensively used in manufacturing
industries for statistical quality control of their products.
·
In
Auditing: In auditing accounts to check compliance, the most natural
way to take a sample from the list of accounts is systematic sampling.
·
In Market
Research: Systematic sampling has its wide applications in market
research.
·
In Crop
Estimation: In crop yield estimation, systematic sampling has been
extensively used.
·
In Health
Studies: In recent years, UNICEF and WHO have been extensively used
systematic sampling method worldwide in child nutrition, iodine deficiency
disorders surveys to assess the prevalence of these diseases.
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