The exact distribution of the sample variance from bounded continuous random variables

Details The exact distribution of the sample variance from bounded continuous random variables The exact distribution of the sample variance from bounded continuous random variables

2008-10-09

arxiv.org/abs/0810.1572v1

Mathematics

Statistics Theory

20 pages

Scientific paper

For a sample of absolutely bounded i.i.d. random variables with a continuous density the cumulative distribution function of the sample variance is represented by a univariate integral over a Fourier series. If the density is a polynomial or a trigonometrical polynomial the coefficients of this series are simple finite terms containing only the error function, the exponential function and powers. In more general cases - e.g. for all beta densities - the coefficients are given by some series expansions. The method is generalized to positive semi-definite quadratic forms of bounded independent but not necessarily identically distributed random variables if the form matrix differs from a diagonal matrix D > 0 only by a matrix of rank 1

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