Abstract
In his interesting article “Finite Markov Processes in Psychology,” G. A. Miller derived a “least-squares estimate” for a matrix of transitional probabilities (I). However, the mathematical proof seems to be unclear. Since this proof is considered invalid (2), we shall present a somewhat clearer version of the proof of this result. We shall also examine the general problem in some detail.In the proof we shall assume that the reader is familiar with matrix notation, which enables a considerably shorter presentation. We shall follow the matrix conventions and the terminology adopted by Miller (I).

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