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Author Question: For two independent random variables X and Y, which of the following identities is always true? ... (Read 115 times)

haleyc112

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on: Jun 24, 2018
For two independent random variables X and Y, which of the following identities is always true?
 
  A) E(2X + 3Y) = E(X) + E(Y) + 5
  B) Var(2X + 3Y) =2Var(X) + 3Var(Y)
  C) Var(2X + 3Y) = 4Var(X) + 9Var(Y)
  D) E(2X + 3Y) = 5E(X+Y)

Question 2

The interquartile range is the average of the first and third quartiles.
 
  Indicate whether the statement is true or false


bassamabas

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

C

Answer to Question 2

FALSE


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