export interface IAnovaResult {
    rejected: boolean;
    testValue: number;
    pValue: number;
    freedom: [number, number];
}
/**
 * @private
 */
export declare function getClassToIndexMap(classes: Set<unknown>): Map<unknown, number>;
/**
 * @private
 */
export declare function getAnovaResult(df1: number, df2: number, fValue: number, alpha: number): IAnovaResult;
/**
 * @private
 */
export declare function calcWithinGroup(allData: number[][], means: number[]): number;
/**
 * @private
 */
export declare function calcBetweenGroups(allData: number[][], means: number[], totalMean: number): number;
/**
 * @private
 */
export declare function getDataByClass(data: number[], classes: unknown[]): {
    dataByClass: number[][];
    allClasses: Set<unknown>;
};