export default class StatArray {
    key: string;
    ratio: number;
    _arr: any[];
    _hist: any[];
    sum: number;
    nsum: number;
    min: number;
    max: number;
    nmin: number;
    nmax: number;
    constructor(key: string, ratio: number);
    get length(): number;
    reset(): void;
    push(o: any): void;
    pushIf(o: any, fn: any, ...args: any[]): any;
    get(): any[];
}