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 ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Suzanne is a content marketer, writer, and ...

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 ...

Melissa Horton is a financial literacy professional. She has 10+ years of experience in the financial services and planning industry. Amanda Jackson has expertise in personal finance, investing, and ...

In the 1980s, John Bollinger, a long-time market technician, developed the technique of using a moving average with two trading bands above and below it. Unlike a percentage calculation from a normal ...