IGCSE Development Studies: Specimen Questions with Answers 37 - 38 of 98

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Research Methodology

Question 37 (2 of 7 Based on Passage)

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Give two advantage and disadvantage of sampling

Explanation

Sampling is defined as the method in which only those items are included in the sample are observed for the purpose of drawing conclusions about the population from which sample is drawn. The sample so obtained is be called as statistic (i. e. It is the measures of central tendency and dispersion are called statistic it is used for the estimation population parameters)

Advantages

  • Sampling leads to better accuracy of data collected. In a small sample more efforts are required to reduce the non- sampling errors and non-response bias.
  • Sampling also reduces the excess demand on resources like materials, finance, and personnel.

Disadvantages

  • Sampling is not recommended for the purpose where record of everyone is required

  • For events that are rare small sample may not give sufficient results.

Question 38 (3 of 7 Based on Passage)

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“Error which arises due to only a sample being used to estimate the population parameter. ” Explain the statement.

Explanation

“Error which arises due to only a sample being used to estimate the population parameter. ” This statement is about sampling errors, Sampling errors refers to the difference between the sample and the population that exist only because of observation that happened to be selected for the sample. By increasing the size of the sample, the sampling error can be reduced. Sampling errors occur due to the inherent errors in the sample of the population.

Types of Sampling Error