Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Andy Smith is a Certified Financial Planner ...

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 ...

While Microsoft Excel helps you manage multiple projects, deadlines, and responsibilities, building complex spreadsheets from scratch can eat up precious hours of your life. Here is where Excel ...