Median

The median is the middle value of an ordered data set, splitting it so that half the values fall below and half above.

To find the median you sort the data and take the center value, averaging the two middle values when the count is even. For example, for 3, 7, and 10 the median is 7, while for 2, 6, 8, and 10 it is (6+8)/2=7(6 + 8) / 2 = 7. Because it depends only on position, not on the size of extreme values, the median resists outliers. This makes the median a better center than the mean for strongly skewed data.

More describing data terms, or browse the full statistics glossary.