Previously, I talked about the mean, median, mode and outliers which described our data in terms of its central tendency. Today I will cover the idea of

There are also two

**V****ariability, or Dispersion.**There are three concepts which allow us to determine it:**D****eviation,**Variance and Standard Deviation. There is also such thing as a Standard Deviation, which I will cover in the next post.There are also two

**great video lessons made by****Khan Academy**, which explain variance in a very easy to follow and entertaining way.