Anyone familiar with basic statistics is familiar with the concept of a bell curve. A bell curve is a visual representation of normal data distribution, in which the median represents the highest ...

A bell curve indicates that about 68% of the data lies within one standard deviation, about 95% of the data lies within two standard deviations, and about 99.7% of the data lies within three ...

The bell curve model limits the quantity of people at the top and also reduces incentives to the highest rating. Given the arbitrary five-scale rating and the fact that most people are 2,3,4 rated ...