Below is an example of calculating the standard deviation of the stock returns of Apple (Nasdaq: AAPL) over a three-month period. Step 1 : Collect daily data going back over a three-month period.

For example, if your mean is in cell A2, population mean in cell B2, standard deviation in cell C2, square root of degrees of freedom in E2, type the formula as =(A2-B2)/(C2/E2) to generate the T ...

First, let's look at what a standard deviation is measuring. Consider two small businesses with four employees each. In one business, two employees make $19 an hour and the other two make $21.

σ 2 = the standard deviation of the second asset Cov 1,2 = the covariance of the two assets, which can thus be expressed as p (1,2) σ 1 σ 2 , where p (1,2) is the correlation coefficient ...

The sample contains five observations and consists of values $10,000, $100,000, $50,000, $45,000, and $35,000. First, the user needs to create an array called "data" containing these observations ...

Standard deviation is a measure of how far away individual measurements tend to be from the mean value of a data set. The standard deviation of company A's employees is 1, while the standard ...

Last year Johnson had a 7.7 standard deviation with a 12.3 PPG, for a value of 1.60. Most of his value (fantasy value, that is) comes from his seasons of two and three years ago.

Standard deviation (SD) is still the most widely used measure of dispersion, or in financial markets, risk.That all sounds a bit technical but it's actually pretty straightforward to understand ...