Let X and Y be two independent random variables.
Identify which of the following statements is false.

• A.E[X-Y] =E [X] - E [Y]
• B.E [XY] E [X] E [Y]
• C.E[2X] = 2E [X
• D.E[X2] = E[X]E[X]

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Identify which of the following is not true about the population variance of a set of data.

• A.It can be calculated as
• B.It is represented by the symbol
  
• C.It can be calculated as
  
  
• D.Its positive square root gives the standard deviation

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The particular solution of the second-order difference equation

Determine the values of(A, B).

• A.(-2, 3)
• B.(5,-2)
• C.(-3, 2)
• D.(-2,5)

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Consider the function f(x) =x2- 5x - 3
The value of one of the roots of the above equation can be obtained by using the iteration formula

Apply the iteration formula to determine the value of the root.

• A.4.40
• B.5.53
• C.0.54
• D.1.54

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