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, Egypt | ||
| 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 | ||
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