A quartile is a statistical term describing a division of a data set into four equal intervals. Find out how it's used to calculate variability around the median.

Derive your third quartile based on whether your data set includes an even or odd set of values. With an odd number of values, multiply N by 3, add 1 and divide the result by 4.

As data from McKinsey reveals, the top quartile of companies for ethnic diversity are 36% more likely to financially outperform their less diverse peers. Those added perspectives can contribute to ...