--- title: Bonferroni Correction - Definition & Examples | RGM® Glossary url: https://realgrowthmatters.com/glossary/bonferroni-correction/ updated: 2026-06-10 source_html: https://realgrowthmatters.com/glossary/bonferroni-correction/ --- Growth Glossary — Definition SHT BONFERRONI-COR # Bonferroni Correction Multiple-testing correction dividing alpha by number of tests. A working definition from the RGM marketing glossary. Multiple-testing correction dividing alpha by number of tests. Term : Bonferroni Correction Field : Statistics & Analytics Category : Statistics & Analytics ## Definition in plain terms Read that twice.Bonferroni Correction is an analytical concept your team should define once. A loose definition misaligns budgets and reporting. Multiple-testing correction dividing alpha by number of tests. Bonferroni Correction belongs to Statistics & Analytics and refers to an analytical concept. A shared definition keeps the team aligned. ## How it operates Keep this in mind.There is no single setting for Bonferroni Correction. It bends to the audience, the channels, and the wider plan. Bonferroni Correction is not a switch you flip. It names a moving idea, and the way it plays out shifts with the setup. A lean team running one paid channel applies Bonferroni Correction differently than a brand running ten. Use Bonferroni Correction loosely and teams pull apart; pin it down and the math lines up. The working rule is plain. Agree what Bonferroni Correction covers first, then act on it. Skip that order and Bonferroni Correction loses its shared meaning, and two teams end up measuring two different things. Look at it this way. ## Where it shows up Worth a slow read.Reach for Bonferroni Correction when a real decision rides on it -- a budget, a metric, or a comparison. Otherwise it is reference. Bring Bonferroni Correction in when a live choice hangs on it. In statistics & analytics work, that usually means one of three moments. Away from a decision, Bonferroni Correction is background, not a lever. 1. **Setting budget.** Bonferroni Correction guides the team toward the better-paying line. 2. **Choosing a metric.** Bonferroni Correction separates a causal read from a coincidence. 3. **Comparing options.** Bonferroni Correction stops a tidy-looking comparison from misleading. ## A worked example Start here.To make Bonferroni Correction concrete, the case below uses Booking.com and figures from public reporting plus RGM analysis. Take Booking.com. During a sample-size correction, the team made Bonferroni Correction the deciding input, not an afterthought. They set a baseline first, agreed one definition of Bonferroni Correction, and only then read the result: 3 of 10 tests stopped being called too early. The number matters less than the order. Worked example for Bonferroni Correction -- illustrative figures, RGM analysis | Stage | What the team did | The reason | | Baseline | Read the starting point before any change to Bonferroni Correction. | A fixed point of truth. | | Define | Locked the scope of Bonferroni Correction so it stayed stable. | A shared definition up front. | | Act | A sample-size correction — one variable. | One change, a clean read. | | Result | 3 of 10 tests stopped being called too early | A call backed by the read. | These Bonferroni Correction numbers are illustrative -- RGM analysis. The structure travels; the specific figures do not. ## Common mistakes Start here.The errors with Bonferroni Correction are predictable: one blanket rule, no context, chasing the word, raw benchmarks. Each is avoidable. - **No segments.** Treating Bonferroni Correction as one number for all. Break it out before you trust it. - **Bare numbers.** Showing Bonferroni Correction on its own. Context is what makes it readable. - **Vanity focus.** Gaming Bonferroni Correction instead of the result. Tie it to business value. - **Raw benchmarks.** Stacking Bonferroni Correction against rivals blind. Normalize for margin, pricing, and sales cycle. ## Quick answers What does Bonferroni Correction mean? Multiple-testing correction dividing alpha by number of tests. Agree the scope of Bonferroni Correction before the planning starts. Why does Bonferroni Correction matter? Bonferroni Correction matters because vague vocabulary breaks strategy. A precise, shared definition keeps a team aligned. How do teams use Bonferroni Correction? Bonferroni Correction supports a real choice: where money goes, what gets measured, which option wins. The Booking.com case traces it. What is the most common mistake with Bonferroni Correction? Treating Bonferroni Correction as one blanket rule and reporting it with no baseline. Both hide a soft assumption. What does Bonferroni Correction mean? : Multiple-testing correction dividing alpha by number of tests. Agree the scope of Bonferroni Correction before the planning starts. Why does Bonferroni Correction matter? : Bonferroni Correction matters because vague vocabulary breaks strategy. A precise, shared definition keeps a team aligned. How do teams use Bonferroni Correction? : Bonferroni Correction supports a real choice: where money goes, what gets measured, which option wins. The Booking.com case traces it. ### Related guides ### Related terms