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Question Number 85859 by jagoll last updated on 25/Mar/20
Is the Var(aX+b) = a^2 Var(X) + b?
IstheVar(aX+b)=a2Var(X)+b?
Answered by Joel578 last updated on 25/Mar/20
nope Assume a and b is constant, then var(b) = E[b^2 ] − {E[b]}^2 = b^2 − b^2 = 0 var(aX + b) = var(aX) + var(b) = a^2 var(X)
nopeAssumeaandbisconstant,thenvar(b)=E[b2]−{E[b]}2=b2−b2=0var(aX+b)=var(aX)+var(b)=a2var(X)
Commented by jagoll last updated on 26/Mar/20
yes sir. agree
yessir.agree
Answered by jagoll last updated on 26/Mar/20

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