What is standard deviation? Standard deviation measure of the dispersion or spread of a set of values. It indicates how much individual data points deviate from the mean (average) of the >data set. It ...

Understanding standard deviation means first understanding variance because standard deviation, mathematically speaking, is the square root of variance.

Learn the basics of calculating and interpreting standard deviation, and how it is used to measure and determine risk in the investment industry.

Understand the basics of standard deviation and Z-score, and learn how each is calculated and used in the assessment of market volatility.

Calculate your T-Value by taking the difference between the mean and population mean and dividing it over the standard deviation divided by the degrees of freedom square root.

Pooled standard deviation is a useful tool when analyzing data sets. It is especially helpful when you’ve taken the time to properly weigh your standard deviations so everything is in balance.

How to Calculate Standard Deviation of Cash Flows in Excel. When reviewing cash flow data for your small business, knowing the standard deviation can help you determine if the numbers are out of ...