West African Journal of Industrial and Academic Research

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Modeling Selected Climatic Variables in Ibadan, Oyo State, Nigeria using the Modified Generalized Burr Density Function

OI Osowole, FJ Ayoola, Y Bello


The aim of this study was fitting the modified generalized burr density function to total rainfall and temperature data obtained from the  meteorological unit in the Department of Environmental Modelling and Management of the Forestry Research Institute of Nigeria (FRIN) in Ibadan, Oyo State, Nigeria. The choice of the density function was based on the positive skewness of the two climate series, a sufficient condition for the selection of the burr density. The Kolmogorov-Smirnov goodness of fit tests and the plots of the cumulative distribution function confirmed the adequacy of the density function to model adequately the two climate series as well as the estimates of the descriptive statistics from the original rainfall and temperature series that compared well with the ones obtained
from the fitted burr density. The modified burr density function is therefore recommended to model skewed datasets of interest.

Keywords: Modified generalized burr density function, Positive skewness, Sufficient condition, Descriptive statistics, Ecosystem, Climate,  Environmental changes

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