Learn the differences between Z-Score and Standard Deviation. Discover how they are calculated and used to evaluate market ...

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 ...

Standard deviation is a common statistical measurement and is defined by Oxford Dictionaries as: ‘A quantity expressing by how much the members of a group differ from the mean value for the group.’ In ...

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 ...

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

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

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Volatility is troublesome for many investors. Value changes in your stocks, your portfolio, or an index can keep you up at night -- or worse, push you to make emotional decisions you later regret.

Choosing a roster with Matt Schaub, Adrian Peterson, Jamal Lewis, and Chad Johnson might win you four or five weeks by a large margin, but you'll lose all the weeks those four put up single digits. In ...