Transition probability matrices for ergodic markov chains

Reference no: EM131005758

Let P(1) and P(2) denote transition probability matrices for ergodic Markov chains having the same state space. Let π1 and π2 denote the stationary (limiting) proba- bility vectors for the two chains. Consider a process de?ned as follows:

(a) X0 = 1. A coin is then ?ipped and if it comes up heads, then the remain- ing states X1, ... are obtained from the transition probability matrix P(1) and if tails from the matrix P(2). Is {Xn, n ? 0} a Markov chain? If p = P{coin comes up heads}, what is limn→∞ P(Xn = i)?

(b) X0 = 1. At each stage the coin is ?ipped and if it comes up heads, then the next state is chosen according to P(1) and if tails comes up, then it is chosen according to P(2). In this case do the successive states constitute a Markov chain? If so, determine the transition probabilities. Show by a counterexample that the limiting probabilities are not the same as in part (a).

Reference no: EM131005758

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