summary-statistics v1.0.0

Summary Statistics

Summarize a set of observations, in order to communicate the largest amount of information as simply as possible. Learn more

Install

npm install summary-statistics --save

Usage

var ss = require('summary-statistics')

var values = [3, 14, 15, 92, 65, 35, 89, 79, 32, 38, 46, 26, 43, 38, 32, 79, 5]

var summary = ss(values)
/* {
 *     num: 17,
 *     sum: 731,
 *     avg: 43,
 * 
 *     min: 3,
 *     q1: 23.25,
 *     median: 38,
 *     q3: 68.5,
 *     max: 92
 * }
 */

ss(values)

values is an array of numbers. Return an object with the keys:

• num: the number of elements in array
• sum: the sum of all elements
• avg: the average
• min: the least value
• q1: the lower quartile (splits off the lowest 25% of data from the highest 75%)
• median: the value in the 'middle' (cuts data set in half)
• q3: the upper quartile (splits off the highest 25% of data from the lowest 75%)
• max: the greatest value

values does not need to be ordered and it will not be modified.