How Not To Sort By Average Rating     CORRECT SOLUTION: Score = Lower bound of Wilson score confidence interval for a Bernoulli parameter Say what: We need to balance the average rating with the uncertainty of a small number of observations. Fortunately, the math for this was worked out in 1927 by Edwin B. Wilson. What we want to ask is: Given the ratings I have, there is a 95% chance that the "real" average rating is at least what? Wilson gives the answer. For simplicity we suppose that there are only positive ratings with value 1 and negative ratings with value 0.     http://www.evanmiller.org/how-not-to-sort-by-average-rating....     tags: stats algorithm stars rating Beyond3D - Which was nice.     http://www.beyond3d.com/articles/fastinvsqrt/     tags: 3d sqrt algorithm graphics quake The Perlin noise math FAQ     http://www.robo-murito.net/code/perlin-noise-math-faq.html     tags: random algorithm Cloud Cover     http://freespace.virgin.net/hugo.elias/models/m_clouds.htm     tags: clouds algorithm Perlin Noise     http://freespace.virgin.net/hugo.elias/models/m_perlin.htm     tags: random algorithm perlin noise