Let $(X_n)_{n\in\mathbb{N}}$ be a Markov chain with State space $E=\{1,2,3\}$ and transission matrix
$$P=\begin{bmatrix} 0 & 1/3 & 2/3 \\ 1/4 & 3/4 & 0 \\ 2/5 & 0 & 3/5 \end{bmatrix}$$
How can I compute $E[X_{n+1}^3|X_n=j]$, for $j=1,2,3$.
2026-03-30 07:04:10.1774854250
Markov Chain Expected value
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Can't you just calculate it? For example,
$E[X_{n+1}^3 | X_n = 1] $
$= 1^3.Pr(X_{n+1} = 1 | X_n = 1) + 2^3.Pr(X_{n+1} = 2 | X_n = 1) + 3^3.Pr(X_{n+1} = 3 | X_n = 1)$
$ = 1 \cdot 0 + 8 \cdot (1/3) + 27 \cdot (2/3) $
$ = ...$