stat.js

A collection of JavaScript statistical functions for arrays

• max
• min
• range
• midrange
• sum
• product
• countEach
• mean
• geometricMean
• harmonicMean
• median
• modes
• variance
• standardDeviation
• meanAbsoluteDeviation
• medianAbsoluteDeviation
• zScores

They are all methods of the stat object. They all accept an array as their only argument. stat.countEach returns an object, stat.modes and stat.zScores return an array, and the rest return a number.