/**
 * Calculate standard score (deviation value)
 * @param  {number} value - Current value
 * @param  {number} averageValue - Mean value
 * @param  {number} standardDeviationValue - Standard deviation
 * @returns {number} Standard score (where 50 is average, each standard deviation is worth 10 points)
 * @example deviationValue(10, 5, 2); // 75
 */
export declare const deviationValue: (value: number, averageValue: number, standardDeviationValue: number) => number;