GRE (Graduate Record Examinations) Psychology Measurement and Methodology-Statistical Procedures Study Material (Page 16 of 25)

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Sampling Techniques: Sampling Design

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Sampling Design

Following are important steps in sampling design or sample survey.

  • Define the population of objects to be sampled.
  • Select and justify a sampling method: Probability sampling vs. non-probability sampling
  • Select and justify a sample size, this selection in term would affect- usefulness and comprehensiveness of content, reliability of results, intelligibility, speed, economy of operation, accurate interpretation, and result presentation.
  • Take pilot sample to decide the degree of precision required (pre testing) .
  • Finally do sampling and generalize the results.

Sampling Techniques: Types of Samples

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Types of Samples

Probability sampling increases the probability of obtaining samples representative of the population. It is therefore considered as best sampling method.

Probability Sampling (Representative Samples)

The aim of this kind of sampling is to represent the population- in composition and characteristics interesting for the research. Every item in the universe has a known chance or probability of b…

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