# Data & Analytics

The how & why behind the numbers

## Articles

- [Introduction to Descriptive Statistics in eCommerce](https://support.prettydamnquick.com/en/articles/11872806-introduction-to-descriptive-statistics-in-ecommerce)
- [Understanding PDQ vs Shopify Analytics](https://support.prettydamnquick.com/en/articles/11873048-understanding-pdq-vs-shopify-analytics)
- [PDQ Analytics Terms 101](https://support.prettydamnquick.com/en/articles/11873198-pdq-analytics-terms-101)
- [Controlled Pre-Experiment Data (CUPED) and how we use it](https://support.prettydamnquick.com/en/articles/12008969-controlled-pre-experiment-data-cuped-and-how-we-use-it)