export declare function ordinaryLeastSquares(uX: number, uY: number, uXY: number, uX2: number): {
    a: number;
    b: number;
};
export declare function visitPoints(data: any[], x: (d: any) => number, y: (d: any) => number, callback: (x: number, y: number, index: number) => void): void;
export declare function rSquared(data: any[], x: (d: any) => number, y: (d: any) => number, uY: number, predict: (x: number) => number): number;
export declare function regressionLinear(data: any[], x?: (d: any) => number, y?: (d: any) => number, options?: {
    alpha?: number;
}): {
    coef: {
        a: number;
        b: number;
    };
    predict: (xx: number) => number;
    rSquared: number;
    evaluateGrid: (N: number) => {
        x: number;
        y: number;
    }[];
    confidenceInterval: (N?: number) => {
        x: number;
        mean: number;
        lower: number;
        upper: number;
        predLower: number;
        predUpper: number;
    }[];
};
declare const _default: {
    ordinaryLeastSquares: typeof ordinaryLeastSquares;
    visitPoints: typeof visitPoints;
    rSquared: typeof rSquared;
    regressionLinear: typeof regressionLinear;
};
export default _default;