ON THE PRODUCT AND RATIO OF PARETO
AND HYPEREXPONENTIAL RANDOM VARIABLES
Noura Obeid1, Seifedine Kadry2 1,2Department of Mathematics and Computer Science
Faculty of Science, Beirut Arab University
P.O. Box 11-5020, Beirut, LEBANON
The distributions of products and ratios of random variables are of interest in many areas of the sciences. In this paper, we find analytically the probability distributions of the product and the ratio , when and are two independent random variables following Pareto and Hyperexponential distributions, respectively. To the best of our knowledge, this is the first study on the combination of these two distributions.
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References
[1] S. Nadarajah, D. Choi, Arnold and Strausss bivariate exponential distribution products and ratios, New Zealand J. of Mathematics, 35 (2006),
189199.
[2] M. Shakil, B.M.G. Kibria, Exact distribution of the ratio of gamma and
Rayleigh random variables, Pakistan J. of Statistics and Operation Research
, 2 (2006), 8798.
[3] M.M. Ali, M. Pal, and J. Woo, On the ratio of inverted gamma variates,
Austrian J. of Statistics, 36 (2007), 153159.
[4] L. Idrizi, On the product and ratio of Pareto and Kumaraswamy random
variables, Mathematical Theory and Modeling, 4 ( 2014), 136146.
[5] S. Park, On the distribution functions of ratios involving Gaussian random
variables, ETRI Journal, 32 (2010), 6.
[6] S. Nadarajah and S. Kotz, On the product and ratio of t and Bessel random
variables, Bull. of the Institute of Math. Academia Sinica, 2 (2007), 5566.
[7] T. Pham-Gia, N. Turkkan, Operations on the generalized-fvariables and
applications, Statistics, 36 (2002), 195209.
[8] G. Beylkin, L. Monzn, and I. Satkauskas, On computing distributions of
products of non-negative independent random variables, Applied and Computational
Harmonic Analysis, 46 (2019), 400416.
ON THE PRODUCT AND RATIO OF PARETO... 469
[9] P.J. Korhonen, S.C. Narula, The probability distribution of the ratio of
the absolute values of two normal variables, J. of Statistical Computation
and Simulation, 33 (1989), 173182.
[10] G. Marsaglia, Ratios of normal variables and ratios of sums of uniform
variables, J. of the Amer. Statistical Association, 60 (1965), 193204.
[11] S.J. Press, The t-ratio distribution, J. of the Amer. Statistical Association,
64 (1969), 242252.
[12] A.P. Basu and R.H. Lochner, On the distribution of the ratio of two random
variables having generalized life distributions, Technometrics, 13 (1971),
281287.
[13] D.L. Hawkins and C.-P. Han, Bivariate distributions of some ratios of
independent noncentral chi-square random variables, Communications in
Statistics - Theory and Methods, 15 (1986), 261277.
[14] S.B. Provost, On the distribution of the ratio of powers of sums of gamma
random variables, Pakistan J. Statistics, 5 (1989), 157174.
[15] T. Pham-Gia, Distributions of the ratios of independent beta variables and
applications, Communications in StatisticsTheory and Methods, 29 (2000),
26932715.
[16] S. Nadarajah and A.K. Gupta, On the ratio of logistic random variables,
Computational Statistics and Data Analysis, 50 (2006), 12061219.
[17] S. Nadarajah and S. Kotz, On the ratio of frchet random variables, Quality
and Quantity, 40 (2006), 861868.
[18] S. Nadarajah, The linear combination, product and ratio of Laplace random variables, Statistics, 41 (2007), 535545.
[19] K. Therrar and S. Khaled, The exact distribution of the ratio of two independent hypoexponential random variables, British Journal of Mathematics
and Computer Science, 4 (2014), 26652675.
[20] L. Joshi and K. Modi, On the distribution of ratio of gamma and three parameter exponentiated exponential random variables, Indian J. of Statistics
and Application, 3 (2014), 772783.
470 N. Obeid, S. Kadry
[21] K. Modi and L. Joshi, On the distribution of product and ratio of t and
Rayleigh random variables, J. of the Calcutta Mathematical Society, 8
(2012), 5360.
[22] C.A. Coelho and J.T. Mexia, On the distribution of the product and ratio of independent generalized gamma-ratio, Sankhya: The Indian J. of
Statistics, 69 (2007), 221255.
[23] A. Asgharzadeh, S. Nadarajah, and F. Sharafi, Weibull lindley distributions, Statistical J., 16 (2018), 87113.
[24] A.P. Prudnikov, Y.A. Brychkov, and O.I. Marichev, Integrals and Series,
Vol. 2, Gordon and Breach Science Publishers, Amsterdam, Netherlands
(1986).
[25] F. Brian and K. Adem, Some results on the gamma function for negative
integers, Applied Mathematics and Information Sciences, 6 (2012), 173176.
[26] I.S. Gradshteyn and I.M. Ryzhik, Table of Integrals, Series and Products,
Vol. 6, Academic Press, Cambridge, MA (2000).
[27] D. Sornette, Multiplicative processes and power law, Phys. Review E, 57
(1998), 4811-4813.
[28] N. Obeid, S. Kadry, On the product and quotient of pareto and rayleigh
random variables, PJS Headquarters Lahore (2019).