The following table shows part of the probability distribution for a random variable x. f(x) 0.15 0.3 3 4. 0.2 (a) The mean of the above distribution is known to be 2.15 (i.e., E(x) = 2.15). Determine...

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Extracted text: The following table shows part of the probability distribution for a random variable x. f(x) 0.15 0.3 3 4. 0.2 (a) The mean of the above distribution is known to be 2.15 (i.e., E(x) = 2.15). Determine f(1) and f(3). f(1) = f(3) = (b) Compute the variance and the standard deviation for the above probability distribution. (Round your standard deviation to three decimal places.) variance standard deviation Need Help? Read It