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A Study on Efficiency of Confidence Interval for a Coefficient of Quartile Variation | Panngam | งดใช้ระบบ 3-31 กค 66 Burapha Science Journal

A Study on Efficiency of Confidence Interval for a Coefficient of Quartile Variation

Nopparat Panngam, Apisak Chairojwattana

Abstract


The objective of this study is to learn on the efficiency of confidence interval for coefficient of quartile variation of Bonett on the data with Laplace Distribution, Logistic Distribution, Weibull Distribution, Lognormal Distribution, Skew Normal Distribution and Gamma Distribution, in event of left-skewed, right-skewed and symmetric leptokurtosis distributions. The study reveals that for right-skewed data, the confidence interval for coefficient of quartile variation of Bonett has good efficiency except for the small sample size (=10). For left-skewed data,              the confidence interval for a coefficient of quartile variation of Bonett has good efficiency and the efficiency increases as sample size increase and the data distribution is closed to symmetry.    

 

Keywords :  interquartile range, coefficient of variation


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References


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