Displaying posts tagged: statistics

Sorting rated content

3 Comments

Anything with user-submitted ratings can be sorted by those ratings. But what is the best way? The naive approach is to sort by average rating. Unfortunately, this would rate 5-stars from a single user as higher than 4.5-stars from 150 users.

Calculating the area under the normal curve in Ruby

No Comments

Summary: Attached is a pure Ruby implementation of the AS66 algorithm (Hill 1973), ported from the Fortran code available here. It estimates the integral of the normal distribution, defaulting to the area under the right tail.