Easystats 
Created by Matthew Grigajtis
Provides easy to use statistical functions to use on an array
Install
In your shell:
gem install easystatsor in your Gemfile:
gem 'easystats'Example
require 'easystats'
array = [4, 8, 15, 16, 23, 42, 42]
%w[
average
median
mode
range
standard_deviation
sum
variance
weighted_moving_average
].each do |method|
puts "#{method}: #{array.send(method.to_sym)}"
endThis will result in:
average: 21.428571428571427
median: 16
mode: 42
range: 38
standard_deviation: 15.295501984321435
sum: 150
variance: 200.53061224489798
weighted_moving_average: 30.476190476190474