GRE (Graduate Record Examinations) Psychology Measurement and Methodology-Statistical Procedures Study Material (Page 15 of 25)

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Sampling Techniques: Laws of Statistics


Selection of part of an aggregate to represent the whole aggregate is known as sampling. Sampling, a long established practice that helps in evaluating, recognizing, and selecting candidates from the universe for taking decisions.

The aim of sampling is to select a set of items (or individuals) which represent the entire population.

Laws of Statistics

Statistics enables drawing conclusions about entire population based on sampled data. It checks validity of sampling, understanding sampled data, drawing inferences, and finally checking validity of those inferences.

There are two laws of statistics, which allow the statistical inferences gathere…

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Sampling Techniques: Sample Size and Sampling Fraction


Sample Size and Sampling Fraction

Sampling involves a compromise between precision and economy of the effort. The smaller the sample, and to a lesser extent, the smaller the sampling fraction, the wider the margin of error of any estimate made from it. In fact, if the …

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