# Stratified Sampling is now available in #Tableau Prep. #data #businessintelligence #analytics

> This is content from just-tim, the data-and-analytics channel by Tim Ngwena (formerly 'Tableau Tim'). Tim has 12+ years of hands-on BI experience and covers Tableau most of all, plus Power BI, Looker, Hex, SQL and data modelling, the analytics industry, and the craft of doing the job — always tool-agnostic and honest about the trade-offs.

- **Author:** Tim Ngwena (just-tim, https://just-tim.com/about)
- **Published:** 2023-10-31
- **Format:** Short · 1 min watch · transcript available
- **Topics:** Data prep, Analytics
- **Tools:** Tableau (prep)
- **Canonical:** https://just-tim.com/posts/stratified-sampling-is-now-available-in-tableau-prep-data-businessintelligence-analytics
- **Watch:** https://www.youtube.com/watch?v=B6pWuiF0RZU

I demonstrate the new Stratified Sampling feature in Tableau Prep, showing how it keeps an equal representative split of values in a chosen column. I compare it against the default Quick Select sampling method to show the difference in how data is represented while you work.

## Key takeaways

- Stratified Sampling in Tableau Prep gives you an equal representative split across a chosen column, such as a default-payments field
- With Stratified switched on you can keep sampling behaviour active while staying performant and easy to work with
- You enable it via the data sample settings, choosing Stratified instead of the default Quick Select method
- Switching back to Quick Select reverts the sample to reflect the original proportions in the dataset rather than an even split

Watch the full video, read the transcript and use chapter deep-links on the page: https://just-tim.com/posts/stratified-sampling-is-now-available-in-tableau-prep-data-businessintelligence-analytics

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just-tim — Data and analytics, with a point of view. · https://www.youtube.com/channel/UC7HYxRWmaNlJux-X7rNLZyw · https://twitter.com/TableauTim · https://www.linkedin.com/in/timngwena