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4.43 The probability density function of a Laplace random variable is given by fx(x)=e -- -xxx. (a) Find the mean mx, second moment, and

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4.43 The probability density function of a Laplace random variable is given by fx(x)=e -- -xxx. (a) Find the mean mx, second moment, and variance . (b) Determine the following probabilities for a = 4 and = 1. (i) Pr[|X-mx|> 20x] (ii) Pr[|X-mx|

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