/**
 * Generate `n` uniform random values in [lo, hi).
 * Uses `Math.random()`; tests should stub `Math.random` for determinism.
 * @param n Number of samples to generate
 * @param options Optional `{ lo, hi }` bounds (defaults to 0..1)
 * @returns Float64Array of length `n`
 */
export declare function randuniform(n: number, options?: {
    lo?: number;
    hi?: number;
}): Float64Array;
/**
 * Generate `n` standard normal samples using the Box-Muller transform.
 * Uses `Math.random()`; tests should stub `Math.random` for determinism.
 * @param n Number of samples to generate
 * @param options Optional `{ mean, sd }` to shift/scale samples
 * @returns Float64Array of length `n`
 */
export declare function randnormal(n: number, options?: {
    mean?: number;
    sd?: number;
}): Float64Array;