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thank you sir🥰
You don't really need to do the second IBP in the Variance. Just multiply and devide the int(2xe(-λx)dx) with λ and you'll get 2/λ*int(λ*x*e^(-λx)) which is 2/λ * E(X) = 2/λ^2 :)
thank you sir🥰
You don't really need to do the second IBP in the Variance. Just multiply and devide the int(2xe(-λx)dx) with λ and you'll get 2/λ*int(λ*x*e^(-λx)) which is 2/λ * E(X) = 2/λ^2 :)