# Wolfram Function Repository

Instant-use add-on functions for the Wolfram Language

Function Repository Resource:

Computes the Hedges g statistic measuring an "effects size" difference between two lists of data

Contributed by:
Seth J. Chandler

ResourceFunction["HedgesG"][{ computes the "effects size" difference between two sets of data |

The function will not evaluate unless *lst*_{1} and *lst*_{2} each have a length greater than one.

Compute the Hedges *g* statistic for two lists of data:

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Compute the Hedges *g* statistic of symbolic data, assuming that the elements of the data are real:

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The function can work on complex values, although its meaning in that case is unclear:

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Find the interval in which *x* must fall in order for the Hedges *g* statistic to exceed 0.8 (this provides a measure of when two sets of data have large differences between them):

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The pooled standard deviation of two data samples is the difference in the means of the two samples divided by their Hedges' *g* statistic:

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The Hedges' *g* statistic of two lists is the negative of the Hedges *g* statistic of the same lists in the reverse order:

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The function will not evaluate unless each inner list has a length greater than 1:

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The function will not evaluate if there are more than two inner lists:

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- 1.0.0 – 02 January 2020

This work is licensed under a Creative Commons Attribution 4.0 International License