In a statistical experiment, an effect size is described as:

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UGC NET Paper 2: Commerce 29 Sep 2022 Shift 2
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  1. Effective testing of hypothesis
  2. Probable success of an experimental manipulation
  3. Quantitative measurement of the magnitude of the experimental effect
  4. Standardised measure of the magnitude of the effect observed in an experiment

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Option 3 : Quantitative measurement of the magnitude of the experimental effect
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UGC NET Paper 1: Held on 21st August 2024 Shift 1
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The correct answer is Quantitative measurement of the magnitude of the experimental effect

Key PointsEffect size is a quantitative measure of the magnitude of the experimental effect. The larger the effect size the stronger the relationship between the two variables.

Effect Size = \(\frac{(Mean \space of \space experimental \space group) \space - \space (Mean \space of \space control \space group)}{Standard \space Deviation}\)

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