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Study of the Normality of a Distribution

Author

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  • Podaºcã Raluca

    (Petroleum- Gas University of Ploiesti)

Abstract

Distributions of many natural phenomena are at least approximately normally distributed. The normal distribution is very important in studying economical phenomena because many variables measured in economics research have distributions that quite closely approximate the normal curve. Because they occur so frequently, there is an unfortunate tendency to invoke normal distributions where they may not be applicable. The purpose of the article is to present the methodology necessary to decide whether a distribution is normal or not. This includes the graphical representation, the calculation of the mean, of the standard deviation, of the theoretical absolute frequencies and finally the application of the chi-squared test.

Suggested Citation

  • Podaºcã Raluca, 2014. "Study of the Normality of a Distribution," Ovidius University Annals, Economic Sciences Series, Ovidius University of Constantza, Faculty of Economic Sciences, vol. 0(1), pages 397-400, May.
    • Handle: RePEc:ovi:oviste:v:xiv:y:2014:i:1:p:397-400
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    More about this item

    Keywords

    the normal curve; the normal distribution; the chi- squared test;
    All these keywords.

    JEL classification:

    • C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
    • C50 - Mathematical and Quantitative Methods - - Econometric Modeling - - - General

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