e/Good–Turing frequency estimation

Information
has gloss	eng: Good–Turing frequency estimation is a statistical technique for predicting the probability of occurrence of objects belonging to an unknown number of species, given past observations of such objects and their species. (In drawing balls from an urn, the objects would be balls and the species would be the distinct colors of the balls (finite but unknown in number). After drawing R_red} red balls, R_black} black balls and R_green} green balls, we would ask what is the probability of drawing a red ball, a black ball, a green ball or one of a previously unseen color.)
lexicalization	eng: Good-Turing frequency estimation
lexicalization	eng: Good–Turing frequency estimation
instance of	c/Categorical data