import type { IsoPrice } from '../../domain.objects/IsoPrice';
import type { IsoPriceShape } from '../../domain.objects/IsoPriceShape';
import type { IsoPriceWords } from '../../domain.objects/IsoPriceWords';
/**
 * .what = calculates the standard deviation of an array of prices
 * .why = enables statistical analysis of price variance with precision safety
 *
 * uses population standard deviation formula: sqrt(sum((x - mean)^2) / n)
 *
 * @example
 * calcPriceStdev(['USD 10.00', 'USD 20.00', 'USD 30.00'])
 * // => 'USD 8.16' (approx)
 *
 * @example
 * calcPriceStdev(['USD 10.00', 'USD 20.00'], { format: 'shape' })
 * // => { amount: 500n, currency: 'USD', exponent: 'centi.x10^-2' }
 */
export declare function calcPriceStdev<TCurrency extends string = string>(prices: (IsoPrice<TCurrency> | string)[], options?: {
    format?: 'words';
}): IsoPriceWords<TCurrency>;
export declare function calcPriceStdev<TCurrency extends string = string>(prices: (IsoPrice<TCurrency> | string)[], options: {
    format: 'shape';
}): IsoPriceShape<TCurrency>;