# NSDC Data Science Flashcards – Descriptive Statistics #2 – What is variance?

This NSDC Data Science Flashcards series will teach you about geospatial analysis, including visualizations, data processing, and applications. This installment of the NSDC Data Science Flashcards series was created and recorded by Emily Rothenberg. You can find these videos on the NEBDHub Youtube channel.

Welcome to our set of Data Science Flashcards Series.

Today, we’ll be discussing variance. So what is variance? Variance is a measure of how far apart a set of numbers is spread out from their average value.

This means that variance is a measure of dispersion.

Variance is also known to be equal to the square of the standard deviation.

The symbol for population variance looks like this sigma. However, it’s also common to see additional symbolic representations like S. If you’re solving for the sample variance.

To learn more about how to solve for variance and standard deviation, follow along with the rest of the NSDC Flashcard Series. flashcard series

Please follow along with the rest of the NSDC Data Science Flashcard series to learn more about math and probability.