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Author Question: Show that Var(X + Y) = Var(X) + Var(Y). Did you expect this result? Why? What will be an ideal ... (Read 31 times)

colton

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on: Jun 24, 2018
Show that Var(X + Y) = Var(X) + Var(Y). Did you expect this result? Why?
 
  What will be an ideal response?

Question 2

Compute the error sum of squares.
 
  A) 116.399
  B) 458.962
  C) 712.082
  D) 688.188


mcabuhat

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Reply #1 on: Jun 24, 2018
Answer to Question 1

Var(X) + Var(Y) = 0.61 + 0.45 = 1.06 = Var(X + Y). Yes, since X and Y are independent random variables.

Answer to Question 2

B


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