IGCSE Development Studies: Specimen Questions with Answers 41 - 42 of 98

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Research Methodology

Question 41 (6 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

Question 42 (7 of 7 Based on Passage)

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Distinguish Between Random Sampling and Non-Probability Sampling

Explanation

Distinguish between Random Sampling and Non-Probability Sampling
S. no.Random SamplingNon-probability sampling
1.It is the method in which elements of the population get an equal opportunity to be selected as a representative sample.It is a method in which elements of the population are not pre-specified and have unequal opportunity of being a sample
2.Selection process is involved is random samplingSelection process involved is arbitrary
3.Results are unbiased due to conclusive natureResults are biased due to exploratory nature
4.Basis of inference in statistical in natureBasis of inference is analytical in nature.

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