Investopedia / Julie Bang Example of a Bell Curve A bell curve's width is defined by its standard deviation, which is calculated as the level of variation of data in a sample around the mean ...

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 ...

So long as the data represents a standard distribution, a bell curve is a powerful analytical tool for investors. If the data doesn’t represent a standard distribution, investors risk misinterpreting ...

2] To create a bell curve in excel, we need three values, average, standard deviation, and normal distribution. Let’s calculate the average of the data first.