It determines the total area under the curve. The entire area = 1, corresponding to 100%. As the value of σ increases, the normal distribution becomes more spread out.

If the total area under the bell curve adds up to 100%, then 68% of it lies between -1 and +1 standard deviation (SD), 95% between -2 and +2 SD, and 99.7% between -3 and +3 SD.

Well, then. Bell, 35, has been watching presidential politics very closely in preparation for another run of his hit one-man show, " The W. Kamau Bell Curve," which begins this weekend.

There is a long standing belief in business that people performance follows the Bell Curve (also called the Normal Distribution). This belief has been embedded in many business practices ...

Wipro ditches 'bell curve' appraisal, more frequent feedback under new system to compete with Infosys, TCS The trigger for this exercise was clear. Employees, mid-level executives and top managers ...