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# Erin Does Things

Erin Weigel • Designer • Speaker • Product & People Manager

## Sitemaps

- [XML Sitemap](https://erindoesthings.com/sitemap.xml): Contains all public & indexable URLs for this website.

## Posts

- [Frequentist sample size calculator](https://erindoesthings.com/2025/07/10/frequentist-sample-size-calculator/) - Use this calculator to learn how many visitors you need in your online A/B test to get statistically significant results.
- [What you need to know about sample ratio mismatches (SRMs)](https://erindoesthings.com/2024/07/01/sample-ratio-mismatch-infographic/) - Randomization within experimentation is important. It's how we isolate the change we aim to learn about. When randomization goes wrong, you can get an SRM.
- [The Good Experimental Design toolkit](https://erindoesthings.com/2024/05/15/good-experimental-design-toolkit/) - The Good Experimental Design toolkit templates and checklist level-up your experimental design. As Ronald Fisher learned, experiment data is only as good as the design you put into it.
- [Lukas Vermeer's manual sample ratio mismatch (SRM) checker](https://erindoesthings.com/2024/04/10/ab-testing-tool-comparison-copy/) - Randomization is the hidden power behind A/B testing. When randomized properly, the confounds in your data are completely removed. This allows you trust any cause/effect relationship you might observe.
- [How Microsoft made big conversion gains with small color tweaks](https://erindoesthings.com/2024/07/15/microsoft-color-tweaks-conversion-gains/) - Some of the most impactful experiments involve improvements in color. Why? Because the right colors can mean the difference between a buy and a bounce.
- [A/B testing tool comparison](https://erindoesthings.com/2024/04/01/ab-testing-tool-comparison/) - Speero's A/B testing tool comparison website Helping you find the right experimentation tool quickly and easily Speero's A/B testing too comparison website includes a comprehensive list of options. If you're looking to buy an experimentation platform or an A/B testing tool, check out Speero's excellent A/B testing tool comparison website. With Speero's A/B testing tool

## Pages

- [Home](https://erindoesthings.com/) - Erin's background in customer service, A/B testing, product management, sales, and engineering gives her a fresh perspective on design.
- [About Erin](https://erindoesthings.com/about-erin-weigel/) - I'm Erin Weigel, a Principal Designer, Team Leader, and Conference Speaker. I deliver impactful, user-centric products and tell stories about how I do it.
- [Conference talks](https://erindoesthings.com/conference-talks/) - Erin Weigel is a conference speaker with more than a decade worth of public speaking experience. Hire her to speak about product design and experimentation.
- [experiment-example](https://erindoesthings.com/experiment/)
- [Workshops](https://erindoesthings.com/workshops/) - Level-up your team's approach to experimental design and research with one of my two workshops: 1. Good Experimental Design Become a better experimenter by getting a tighter grasp of these concepts: null hypothesis p-values confidence intervals alpha & 1-beta (significance & power) sample size calculations choosing the right metrics run time calculations error types etc.
- [Services](https://erindoesthings.com/services/) - I'm a conference speaker who tells practical, fun stories at events worldwide. As seen at these companies and events: Spotify, Hotjar, Meta, ConversionXL
- [Advisory services](https://erindoesthings.com/advisory-services/) - You've got a tough challenge to tackle. And you don't have to face it alone. When you hire me as your trusted advisor, I show up for you with strategic thinking, practical advice, and hands-on support. With more than 15 years in the field of experimentation and design, I've run and analyzed thousands of experiments
- [Contact](https://erindoesthings.com/contact/) - If you want to book me, Erin Weigel, as a Conference Speaker, please fill out this form. You can also just say hi or ask a question. I'll get back to you.
- [My book](https://erindoesthings.com/design-for-impact/) - “Design for Impact: Your Guide to Designing Effective Product Experiments” covers the conversion design process to help you improve UX and grow your business.
- [Resources](https://erindoesthings.com/resources/)
- [Shop](https://erindoesthings.com/shop/)
- [Media Kit](https://erindoesthings.com/media-kit/) - This page feature professional and casual headshots of Erin Weigel for conference and event organizers to use for promotion.
- [Privacy policy](https://erindoesthings.com/privacy-policy/) - Privacy Policy Last updated: June 06, 2024 This Privacy Policy describes Our policies and procedures on the collection, use and disclosure of Your information when You use the Service and tells You about Your privacy rights and how the law protects You. We use Your Personal data to provide and improve the Service. By using

## Products

- [Design for Impact Paperback – with FREE sticker](https://erindoesthings.com/product/design-for-impact-paperback-e-book/) - Design for Impact is a down-to-earth A/B testing guide. It features the Conversion Design process to help you and your team drive business growth.

## Categories

- [Uncategorized](https://erindoesthings.com/category/uncategorized/)
- [A/B Testing](https://erindoesthings.com/category/a-b-testing/)
- [Resources](https://erindoesthings.com/category/resources/)
- [Stories](https://erindoesthings.com/category/stories/)

## Tags

- [resources](https://erindoesthings.com/tag/resources/)
- [Testing](https://erindoesthings.com/tag/testing/)

## Product categories

- [Uncategorized](https://erindoesthings.com/product-category/uncategorized/)