The literature concerning so-called 'simple' statistical prediction methods suggests that there is no possibility to estimate the mean error in prediction for these methods. This article shows that there is such possibility. As an example the author considers the 'status quo' method and the extrapolation of the mean method and derives the formulas for the mean error in prediction for these methods. The author also compares estimated mean errors in prediction for both methods.
B. Guzik, Akademia Ekonomiczna w Poznaniu, Wydzial Informatyki i Gospodarki Elektronicznej, Katedra Ekonometrii, al. Niepodleglosci 10, 60-967 Poznan, Poland
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