Show that there does not exist a random variable X having mean ???? and variance ????2 such

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Show that there does not exist a random variable X having mean ???? and variance ????2 such that P(???? − 3???? < X < ???? + 3????) = 0.80.

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Introduction To Probability Volume 2

ISBN: 9781118123331

1st Edition

Authors: Narayanaswamy Balakrishnan, Markos V. Koutras, Konstadinos G. Politis

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