Statistics: Proof of V(X)=E(X²)-[E(X)]²
The tutor offers proof of a formula he recalls from Stats. In my university Stats courses, a formula referred to often was V(X)=E(X^2)-(E(X))^2 in which V(X)=population variance E(X^2)=expected value of X^2 E(X)=expected value of X Here’s how I believe one …