Journal of Applied Probability, Vol. 26, No. 4 (Dec., 1989), pp. 685-694 (10 pages) We obtain an approximation to the mean time to extinction and to the quasi-stationary distribution for the standard ...

This is a preview. Log in through your library . Abstract In IRT models, responses are explained on the basis of person and item effects. Person effects are usually defined as a random sample from a ...

In the 1970s, mathematicians studying population growth discovered a simple equation — the logistic map — that produced ...