X is a random variable with expected value E(X).

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IFoA IFoA_CAA_M0 Question Answer

X is a random variable with expected value E(X).

Identify which of the following is not a valid method for calculating the variance of X.

A.

E[ X - E(X) ]2

B.

The second moment of X minus the square of the first moment of X.

C.

E( X2 ) - [ E(X) ]2

D.

E( X2 ) - E(X)

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Update on: Oct 27, 2025
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Integrate: A)B)C) D)

The table below shows the distribution of the number of people in each household in...

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TESTED 27 Oct 2025