If you’re wondering how to find the variance in your data set, look no further. Here’s how to calculate variance in a snap with Pandas.

Variance is a measurement of the spread between numbers in a data set. Investors use the variance equation to evaluate a portfolio’s asset allocation.

Production volume variance measures overhead cost per unit of actual production against the expectations reflected in a business's budget.

Variance is also used in machine learning to understand changes in model performance due to using different samples of training data. Calculating variance is easy using Python.