1.

Write down the Formulae of Variances:

Answer»
  • Var(X)= {E(X2 )-[E(X)]2},
  • V (a)=0,
  • V(aX)=a2 V(X)
  • V(aX+b)=a2V(X), and S.D.(X)= √v(x).


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