B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
75%
75% -- share of tests concluded within 22 7pct of traditional visitors for Bayesian A/B tests (2026)
75% of Bayesian A/B tests concluded within 22.7% of the sample size needed by traditional tests.
- Based on a simulation study
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
75%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Towards Data Science
Primary
Tier C
https://kirro.io/bayesian-ab-testing ↗
Source Article
Bayesian A/B testing: when it helps (and when it doesn't)
Bayesian A/B testing measures which version of a page works better using a probability that updates as data comes in. Instead of waiting for some magic number of visitors, you get a running answer: “Version B has an 89% chance of getting more signups.”
That’s it. No statistics degree required.
Peopl…
Original Research
Towards Data Science
· Original study ↗
Methodology
Simulation study from Towards Data Science
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Bayesian A/B tests: 75% share of tests concluded within 22 7pct of traditional visitors. Source: Towards Data Science (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/tds-bayesian-visitor-efficiency-22-7pct
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<blockquote cite="https://lighthousedata.io/data/tds-bayesian-visitor-efficiency-22-7pct" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>75%</strong> -- share of tests concluded within 22 7pct of traditional visitors for Bayesian A/B tests<br><small>Source: Towards Data Science (2026) · <a href="https://lighthousedata.io/data/tds-bayesian-visitor-efficiency-22-7pct" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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