/**
 * Zero-inflated negative binomial
 */
export default class ZeroInflatedNegativeBinomial {
    /**
     * Fit model.
     * @param {number[]} x Training data
     */
    fit(x: number[]): void;
    _pi: number;
    _l: number;
    _k: number;
    _probability(z: any, p: any, k: any, l: any): any;
    /**
     * Returns predicted probabilities.
     * @param {number[]} x Sample data
     * @returns {number[]} Predicted values
     */
    probability(x: number[]): number[];
}