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Random Variablesmedium
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A discrete variable XXX has PMF P(X=k)=1/4P(X=k) = 1/4P(X=k)=1/4 for k∈{−2,−1,1,2}k \in \{-2, -1, 1, 2\}k∈{−2,−1,1,2}. What is the kurtosis?