When you have the average production of three machines, it is easy to calculate the average or mean production. You just add ...

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.

Standard deviation is the dispersion between two or more data sets. For example, if you were designing a new business logo and you presented four options to 110 customers, the standard deviation ...

In statistics, a standard deviation is a measure of the amount of variation or dispersion of a set of values. The Syntax for the STDEV function is below: Number 1 : The first number argument that ...

Enter a sample range of numbers in Excel as if you were at an event asking people their ages, for example. With that data you can then calculate the mean average and the standard deviation based ...

H. Leon Harter, The Use of Sample Quasi-Ranges in Estimating Population Standard Deviation, The Annals of Mathematical Statistics, Vol. 30, No. 4 (Dec., 1959), pp. 980-999 Free online reading for over ...

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 ...

Downside deviation can also tell you when a "risky" investment with a high standard deviation is likely safer than it looks. Consider an investment that pays 40% half the time and still pays 20% ...