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#laplace-distribution

2 questions from Probability

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Question 1: Short answer

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The Laplace distribution has density p(x)=12e−∣x∣p(x) = \frac{1}{2}e^{-|x|}. What is its standard deviation? (Hint: ∫0∞x2e−x dx=2\int_0^\infty x^2 e^{-x}\,dx = 2.)

a number, 3 decimals