Standard deviation measures how far numbers in a data set are spread out from an average value. In investing, it is used as a measurement of portfolio volatility.

Learn the standard deviation formula, how to calculate it, and its importance in data analysis. Step-by-step guide with examples.

With standard deviation at 1.91 percent, it suggests that the range is plus or minus 1.91 percentage points from the average, meaning that Apple’s returns tend to range from -1.83 percent to 1. ...

Suppose you have a series of numbers and you want to figure out the standard deviation for the group. The numbers are 4, 34, 18, 12, 2, and 26. We need to determine the mean or the average of the ...

With that, Excel can generate a series of random numbers based on the data entered and the standard deviation. With this data you can then create a curved chart, known as a bell curve. Data ...

The data series is the data that appears at the bottom of the graph or chart. It can be the row or column names. It is straightforward to create a bar graph or chart , Line chart , etc. in an ...

Standard deviation is equal to the square root of a data set's variance. It measures how spread out points are from the ...