/**
 * Computes a quantile for a numeric array.
 * @param arr
 * @param prob
 * @param sorted
 * @returns
 */
export declare function quantile(arr: Array<number>, prob: number, sorted?: boolean): number;
/**
 *
 * The IQR (Interquartile Range) describes the middle 50% of values when ordered from lowest to highest.
 * To find the interquartile range (IQR), ​first find the median (middle value) of the lower and upper half of the data.
 * These values are quartile 1 (Q1) and quartile 3 (Q3). The IQR is the difference between Q3 and Q1.
 * ----------------------------------
 * |                                |
 * |   25%    25%     25%     25%   |
 * |       Q1      Q2      Q3       |
 * ----------------------------------
 *               Median
 * @param arr
 * @returns
 */
export declare function iqr(arr: Array<number>): number[];