Abstract
For a prime p, positive integers r,n, and a polynomial f with coefficients in 𝔽pr, let Wp,r,n(f)=fn(𝔽pr)\fn+1(𝔽pr). As n varies, the Wp,r,n(f) partition the set of strictly preperiodic points of the dynamical system induced by the action of f on 𝔽pr. In this paper, we compute statistics of strictly preperiodic points of dynamical systems induced by unicritical polynomials over finite fields by obtaining effective upper bounds for the proportion of 𝔽pr lying in a given Wp,r,n(f). Moreover, when we generalize our definition of Wp,r,n(f), we obtain both upper and lower bounds for the resulting averages.