/// <reference types="types/jstat" />
export declare enum TrendType {
    NO_TREND = "no trend",
    INCREASING = "increasing",
    DECREASING = "decreasing"
}
export declare function originalMKTest(xOld: number[], alpha?: number, calcScope?: boolean): {
    trend: TrendType;
    pValue: number;
    zScore: number;
    slope: number;
    intercept: number;
};
export declare function spearmanCoefficient(array1: number[], array2: number[]): any;
export declare function pearsonCorrelationCoeff(array1: number[], array2: number[]): any;
export declare function studentTQuantile(x: number, degree: number): number;
export declare function coefficientVariation(data: number[]): any;
export declare function longestTrendInterval(data: number[], trendType?: TrendType): {
    length: number;
    start: number;
    end: number;
    maxTrend?: undefined;
} | {
    length: number;
    start: number;
    end: number;
    maxTrend: number;
};
export declare const getMeanAndstdDev: (data: number[]) => {
    mean: number;
    stdDev: number;
    max: number;
    min: number;
};