import { ArrayIteratee } from "./types";
/**
 * This method is like `mean` except that it accepts `iteratee` which is
 * invoked for each element in `array` to generate the value to be averaged.
 * The iteratee is invoked with one argument: (value).
 *
 * @since 5.11.0
 * @category Math
 * @param {Array} array The array to iterate over.
 * @param {Function} iteratee The iteratee invoked per element.
 * @returns {number} Returns the mean.
 * @example
 *
 * const objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }]
 *
 * meanBy(objects, ({ n }) => n)
 * // => 5
 */
export declare function meanBy<T = any>(array: Array<T>, iteratee: ArrayIteratee<T, number>): number;
export default meanBy;