Simple implementation of Wilson score interval in Node.js. For browser version refer to https://github.com/msn0/wilson-score-interval.
Wilson score interval is a perfect tool for scoring comments. The only data you need is a number of upvotes and a total number of votes. It has really good properties even for small number of votes.
npm install wilson-node
var wilson = require('wilson-node');
wilson(upVotes, total);
wilson(430, 474); // {left: 0.8776750858242243, right: 0.9301239839930541}
wilson(392, 436); // {left: 0.8672311846637769, right: 0.9239627360567735}
wilson(10, 14); // {left: 0.4535045882751561, right: 0.882788120898909}