Let X be a random variable with E(X) = ,E(X )2 = 2 and such that 4 = E(X )4 exists. Then 4/4

Let X be a random variable with E(X) = μ,E(X − μ)2 = σ2 and such that γ4 =

E(X − μ)4 exists. Then γ4/σ4 is called the coefficient of kurtosis. Find kurtosis of the following distributions: (i) N(0, 1). (ii) N(μ,σ2). (iii) BIN(1,p). (iv) POI(λ).