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Author Question: If X and Y are two variables with x = 3.8, y = 4.2, and COV(X, Y) = -0.25, then V(X + Y) = 31.58. ... (Read 56 times)

tth

  • Hero Member
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  • Posts: 579
on: Jun 24, 2018
If X and Y are two variables with x = 3.8, y = 4.2, and COV(X, Y) = -0.25, then V(X + Y) = 31.58.
  Indicate whether the statement is true or false

Question 2

If X and Y are two variables with E(XY) = 10.56, E(X) = 4.22, and E(Y) = 5.34, then COV(X, Y) = 1.0.
  Indicate whether the statement is true or false


kxciann

  • Sr. Member
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  • Posts: 356
Reply #1 on: Jun 24, 2018
Answer to Question 1

T

Answer to Question 2

F


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