B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
10%
10% -- experiment success rate for Google and Bing experimentation programs (2025)
Only 10% to 20% of tests produce positive results at Google and Bing.
- Reported as a range (10% to 20%)
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
10%
Unit
Percentage
Data Vintage
2025
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
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Google and Bing experimentation teams
Primary
Tier B
https://kirro.io/type-1-vs-type-2-errors-in-a-b-testing ↗
Source Article
Type 1 vs type 2 error in A/B testing
A type 1 error means your A/B test says “we have a winner” when there’s no real difference. A type 2 error means your test says “nothing happened” when there actually was a winner hiding in the data.
Both cost you money. One makes you ship changes that don’t work. The other makes you throw away chan…
Original Research
Google and Bing experimentation teams
· Original study ↗
Methodology
Range 10-20%, midpoint used
Methodology documented
Segmentation
IndustryMedia
RoleAll marketers
Channelmulti-channel
Cite this stat
Plain Text
Google and Bing experimentation programs: 10% experiment success rate. Source: Google and Bing experimentation teams (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/google-bing-tests-positive-results-10-20
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<blockquote cite="https://lighthousedata.io/data/google-bing-tests-positive-results-10-20" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>10%</strong> -- experiment success rate for Google and Bing experimentation programs<br><small>Source: Google and Bing experimentation teams (2025) · <a href="https://lighthousedata.io/data/google-bing-tests-positive-results-10-20" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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