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One tailed vs. two tailed tests

One tailed vs. two tailed tests

Choosing between one and two-tailed hypothesis affects every stage of A/B testing. Learn why, and explore the pros & cons of each approach.
Go to the profile of Allon Korem | CEO, Bell Statistics
Allon Korem | CEO, Bell Statistics
It’s normal not to be normal(ly distributed) — what to do when data is not normally distributed

It’s normal not to be normal(ly distributed) — what to do when data is not normally distributed

Why deviations from normality are often not a significant concern in A/B testing, and what are the alternative methods to t-test
Go to the profile of Allon Korem | CEO, Bell Statistics
Allon Korem | CEO, Bell Statistics
Why the uplift in A/B tests often differs from real-world results

Why the uplift in A/B tests often differs from real-world results

Explore why the uplift seen in A/B tests often differs from real-world outcomes, and get insights on how to manage expectations…
Go to the profile of Allon Korem | CEO, Bell Statistics
Allon Korem | CEO, Bell Statistics
Size matters: How to plan test duration when using CUPED

Size matters: How to plan test duration when using CUPED

Learn how to use CUPED, a powerful technique that enhances the sensitivity of your tests and helps in resource optimization.
Go to the profile of Allon Korem | CEO, Bell Statistics
Allon Korem | CEO, Bell Statistics
Lift : Popular Tools for Accurate Campaign Impact Analysis

Lift : Popular Tools for Accurate Campaign Impact Analysis

To truly understand the impact of your campaigns, you need to measure lift. Here are three popular tools to measure the lift of a campaign.
Go to the profile of Amit Sasson | MMM & Geo Test Lead, Bell Statistics
Amit Sasson | MMM & Geo Test Lead, Bell Statistics
Back to the Future: Trends and Innovations in MMM

Back to the Future: Trends and Innovations in MMM

Here are three key trends shaping the future of MMM: the emphasis on causality, the adoption of Bayesian methods, and real-time analysis
Go to the profile of Amit Sasson | MMM & Geo Test Lead, Bell Statistics
Amit Sasson | MMM & Geo Test Lead, Bell Statistics
The Ultimate Guide to Choosing Your Perfect MMM Tool

The Ultimate Guide to Choosing Your Perfect MMM Tool

In this blog post, we compare three leading free MMM tools — Robyn, Meridian, and Orbit — along with the option of paid tools or…
Go to the profile of Amit Sasson | MMM & Geo Test Lead, Bell Statistics
Amit Sasson | MMM & Geo Test Lead, Bell Statistics
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