A concept of statistics, normal distribution is depicted through a bell-shaped curve which signifies that average scores are concentrated in the middle with outliers forming a thin line on both sides. Bell curves are used in force ranking employees in performance appraisals.
Diagrams
Originated from/Coined by
Gauss
Further Reading/ References
https://empxtrack.com/blog/bell-curve-for-performance-appraisal/
https://en.wikipedia.org/wiki/Normal_distribution
http://www.cavinhr.com/relevance-of-bell-curve-method-of-performance-appraisal/