Why Your A-B Test Sample Size Is Probably Wrong

What this episode covers

Lucas and Luna dive into one of the most overlooked errors in A-B testing: miscalculating sample size. Using a real-world case from a mid-market SaaS company, they show how a seemingly valid test with 10,000 visitors per variant actually needed 50,000 to detect a realistic 2 percent lift. They explain the math behind statistical power, why most online calculators give misleading defaults, and how to fix your sample size planning tomorrow. Episode 50 of Conversion Rate Optimization with Fexingo. #ABTesting #SampleSize #StatisticalPower #ConversionRateOptimization #CRO #Marketing #MarketingStrategy #DataScience #Statistics #SaaS #Experimentation #Business #BusinessPodcast #FexingoBusiness #Podcast #LucasAndLuna #ExperimentationCulture #TestDesign Keep every episode free: buymeacoffee.com/fexingo

Share this episode

Similar Episodes

I'm ok

Mar 26, 2026 ·1m

Food Saved My Life

Mar 19, 2026 ·34m

Eat More Vegetables: The 4 Foods That Beat Ozempic (Naturally)

Feb 18, 2026 ·11m

How to End Heart Disease with Dr. Fuhrman

Feb 11, 2026 ·45m

Revolutionizing Breast Health: QT Imaging, Overdiagnosis, and What to Do Instead

Jan 27, 2026 ·35m

REMIX: Why we over-shop and compulsively acquire, and how to stop, with Dr Jan Eppingstall

Jan 9, 2026 ·61m

Similar Podcasts

MG Show MG Show The MG Show, hosted by Jeffrey Pedersen and Shannon Townsend, is a leading alternative media platform dedicated to uncovering the truth behind today’s most pressing political issues. Launched in 2019, the show has grown exponentially, offering unfiltered insights, comprehensive research, and real-time analysis. With a commitment to independent journalism and factual integrity, the MG Show empowers its audience with knowledge and encourages active participation in the political discourse. Ask A Spaceman Archives - 365 Days of Astronomy Ask A Spaceman Archives - 365 Days of Astronomy Podcasting Astronomy Every Day of the Year Breaking News Show | eTurboNews Juergen Thomas Steinmetz News is relevant to the global travel and tourism industry, human rights and global issues.Breaking news when it happens and only from the source. Eat to Live Jenna Fuhrman, Dr. Fuhrman Our health is our most precious gift and smart nutrition can change your life. Each month, join Dr. Fuhrman and his daughter, Jenna Fuhrman as they discuss important topics in the world of nutrition. Eat to Live will change the way you eat and think about food.

Frequently Asked Questions

How long is this episode of Conversion Rate Optimization with Fexingo: A/B Testing, Landing Pages, and CRO Strategy?

This episode is 6 minutes long.

When was this Conversion Rate Optimization with Fexingo: A/B Testing, Landing Pages, and CRO Strategy episode published?

This episode was published on June 13, 2026.

What is this episode about?

Lucas and Luna dive into one of the most overlooked errors in A-B testing: miscalculating sample size. Using a real-world case from a mid-market SaaS company, they show how a seemingly valid test with 10,000 visitors per variant actually needed...

Can I download this Conversion Rate Optimization with Fexingo: A/B Testing, Landing Pages, and CRO Strategy episode?

Yes, you can download this episode by clicking the download button on the episode player, or subscribe to the podcast in your preferred podcast app for automatic downloads.