Saleh, A., El-Attar, S. (2002). Testing the Equality of Coefficient of Variation in K Inverse Gaussian Populations. test, 46(2), 129-144. doi: 10.21608/esju.2002.313794
Amina A. Saleh; Somia K. El-Attar. "Testing the Equality of Coefficient of Variation in K Inverse Gaussian Populations". test, 46, 2, 2002, 129-144. doi: 10.21608/esju.2002.313794
Saleh, A., El-Attar, S. (2002). 'Testing the Equality of Coefficient of Variation in K Inverse Gaussian Populations', test, 46(2), pp. 129-144. doi: 10.21608/esju.2002.313794
Saleh, A., El-Attar, S. Testing the Equality of Coefficient of Variation in K Inverse Gaussian Populations. test, 2002; 46(2): 129-144. doi: 10.21608/esju.2002.313794

Testing the Equality of Coefficient of Variation in K Inverse Gaussian Populations

The Egyptian Statistical Journal
Article 2, Volume 46, Issue 2, December 2002, Pages 129-144    PDF (16.75 M)
Document Type: Original Article
DOI: 10.21608/esju.2002.313794
Authors
Amina A. Saleh* ; Somia K. El-Attar*
Dep. of Applied Statistic & Econometric, Institute of Statistical Studies & Research, Cairo University
Abstract
Three tests (likelihood ratio test, Wald test and Score test) are derived for the hypothesis that the coefficients of variation of k Inverse Gaussian populations are equal. The k samples may be of unequal size. The usual x²-approximation is used to investigate the behavior of the three tests under the null hypothesis and to compare the powers of these tests via a simulation study. Independent samples of equal and unequal size from the Inverse Gaussian distribution were used.
 
Keywords
Inverse Gaussian Distribution; Likelihood Ratio Test; Score Test; Wald Test; X; Approximation; Coefficient of Variation; Simulation of Size; Simulation of Power
Statistics
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