/**
 * Calculate deviation score (T-score)
 * @param  {number} value Input value
 * @param  {number|number[]} averageValue Average value or array of values to calculate average from
 * @param  {number} standardDeviationValue Standard deviation (optional if averageValue is array)
 * @returns {number} Deviation score (50 is average, each standard deviation is worth 10 points)
 * @returns {number} Returns 50 when standard deviation is 0 (all values are the same)
 * @example deviationValueSimple(60, 50, 10); // 60 (one standard deviation above mean)
 * @example deviationValueSimple(60, [40, 50, 60]); // Calculates using array values
 */
export declare function deviationValueSimple(value: number, averageValue: number[]): number;
export declare function deviationValueSimple(value: number, averageValue: number, standardDeviationValue: number): number;