Beta-normal distribution: Bimodality properties and application

Felix Famoye, Carl Lee, Nicholas Eugene

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


The beta-normal distribution is characterized by four parameters that jointly describe the location, the scale and the shape properties. The beta-normal distribution can be unimodal or bimodal. This paper studies the bimodality properties of the beta-normal distribution. The region of bimodality in the parameter space is obtained. The beta-normal distribution is applied to fit a numerical bimodal data set. The beta-normal fits are compared with the fits of mixture-normal distribution through simulation.

Original languageEnglish
Pages (from-to)85-103
Number of pages19
JournalJournal of Modern Applied Statistical Methods
Issue number1
StatePublished - 2004


  • Bimodal region
  • Curve estimation
  • Egg size distribution
  • Percentiles


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