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2 points Suppose that X and Y are identical and independent Exponential random variables, each with an expected value of 6 (or equivalently, with a

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2 points Suppose that X and Y are identical and independent Exponential random variables, each with an expected value of 6 (or equivalently, with a rate of 1/6). Let Z = 2X - Y. What is the value of the standard deviation of Z rounded to the nearest tenth? 10.4 13.4 6.0 18 28.8 Previous

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