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The Doctor Is In! Diagnostic Analysis

  • Daniel C. Jupiter
    Correspondence
    Address correspondence to: Daniel C. Jupiter, PhD, Department of Preventive Medicine and Community Health, The University of Texas Medical Branch, 301 University Boulevard, 1.134G Ewing Hall, Galveston, TX 77555-1150. (D.C. Jupiter).
    Affiliations
    Associate Professor, Department of Preventive Medicine and Community Health, The University of Texas Medical Branch, Galveston, TX
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      Abstract

      To make meaningful inferences based on our regression models, we must ensure that we have met the necessary assumptions of these tests. In this commentary, we review these assumptions and those for the t-test and analysis of variance, and introduce a variety of methods, formal and informal, numeric and visual, for assessing conformity with the assumptions.

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      References

        • Jupiter D.
        Investigators' corner: assumptions of statistical tests: what lies beneath.
        J Foot Ankle Surg. 2017; 56: 910-913
        • Jupiter D.
        Investigators' corner: snug as a bug: goodness of fit and quality of models.
        J Foot Ankle Surg. 2017; 56: 1357-1360
        • Jupiter D.
        Investigators' corner: mind your p values.
        J Foot Ankle Surg. 2013; 52: 138-139
        • Jupiter D.
        Investigators' corner: turning a negative into a positive.
        J Foot Ankle Surg. 2013; 52: 556-557
        • Jupiter D.
        Investigators' corner: multiple choice answers: what to do when you have too many questions.
        J Foot Ankle Surg. 2015; 54: 285-286