
doi: 10.1007/bf03003996
Six1,x2,...,xn representan una muestra de N observaciones independientes de una variable de Poisson, se sabe [2] que el «indice de dispersion» $$z = \sum\limits_{i = 1}^N {(x_i - \bar x)^2 } /\bar x$$ tiene aproximadamente una distribucion χ2 con (N−1) grados de libertad.
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