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The current practice is to instead use a bootstrapping method to estimate the variance of ''β,,2,,*β,,3,''. The current practice is to instead use a bootstrapping method to estimate the [[Statistics/Variance|variance]] of ''β,,2,,β,,3,,''.

The calculated test statistic is then compared to a [[Statistics/TestStatistic|critical value]] from either a [[Statistics/NormalDistribution#Standard_Normal_Distribution|Z]] or [[Statistics/StudentsTDistribution|t distribution]].

Sobel Test

The Sobel test is a test for mediation.

Contents

  1. Sobel Test
    1. Description

Description

The hypothesis is formulated such that the relationship between an independent and dependent variable is an indirect effect through a mediator variable.

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In these pictured terms, the Sobel test statistic is calculated as:

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The current practice is to instead use a bootstrapping method to estimate the variance of β2β3.

The calculated test statistic is then compared to a critical value from either a Z or t distribution.

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Statistics/SobelTest (last edited 2025-12-19 21:52:52 by DominicRicottone)