# How Did These Everyday Statistical Concepts Happen to Be the Way They Are?

## A short history to put you in the scientistsâ€™ shoes and see the world through their eyes.

We all had these questions when we first learned about the basic statistical terms in primary school:

**Why is standard deviation ( đťśŽ) or variance (đťśŽÂ˛) the way they are?** We intuitively get the part where we calculate how far each sample (

*x*) is from the mean (

*ÎĽ*). Thatâ€™s what deviation sounds like after all. But why is it squared, then?