The T-Value is a common statistical calculation with a very wide range of applications. In the business world, it can help in making educated financial predictions and projections. For example, a ...

While Excel is useful for many applications, it is an indispensable tool for those managing statistics. Two common terms used in statistics are Standard Deviation and ...

When reviewing cash flow data for your small business, knowing the standard deviation can help you determine if the numbers are out of whack. Calculating standard deviation manually can be ...

Marshall Hargrave is a stock analyst and writer with 10+ years of experience covering stocks and markets, as well as analyzing and valuing companies. Dr. JeFreda R. Brown is a financial consultant, ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Somer G. Anderson is CPA, doctor of ...

The formula of Mean: In statistics, "mean" is a measure of central tendency, calculated by summing up all the values in a dataset and dividing by the number of data points. The single numerical value ...

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Short-term standard deviation is best used for Cp and Cpk. When calculating Pp and Ppk, the long-term standard deviation is your best choice. These measurements are commonly confused, even by skilled ...

Flickr via Google Images Standard deviation is a concept that's thrown around frequently in finance. So what is it? When working with a quantitative data set, one of the first things we want to know ...