The interquartile mean is a measure of central tendency. While all values in a data set are used to calculate the mean, only the interquartile range -- the central portion of a data set -- is used to ...

A price breakpoint is a discount you offer your customers based on the amount of units that they order. The breakpoint is the lower value of the range that entitles a customer to a discount. For ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Getty Images / juststock The forward ...

To calculate the Consumer Price Index between two years in Excel, take a sum of all the amounts spent on the basket of products over those two years. Then use the following formula to find the CPI ...

Working with ranges in Excel is a fast and simple way to identify, define, or refer to a single cell, a range (or group) of cells, a specific or constant value, or a formula. Then you can use those ...

Have you ever found yourself wrestling with Excel formulas, trying to calculate moving averages or rolling totals, only to end up frustrated by the constant need for manual adjustments? You’re not ...

Claire Boyte-White is the lead writer for NapkinFinance.com, co-author of I Am Net Worthy, and an Investopedia contributor. Claire's expertise lies in corporate finance & accounting, mutual funds, ...

Over the last few months, I’ve written several articles about Excel’s newish dynamic array functions. In many cases, they can replace older, more complex expressions. The new functions do all that ...

Calculating Simple Interest is an excellent method to judge your savings in advance. However, calculating it for various interests and principal sums could be complex. This is where Excel comes to ...

Successful investing requires the ability to distinguish long-term trends from the short-term noise that moves stock prices on a minute-to-minute basis. One way to tune out the random oscillations and ...