B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
48%
48% -- marathon participation likelihood for nine-enders (people aged 29, 39, etc.) (2025)
Nine-enders are 48% more likely to participate in a marathon.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
48%
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
Adam Alter
Primary
Tier B
https://guerillascope.co.uk/news/why-context-is-key-when-it-comes-to-media-planning/ ↗
Source Article
Why context is key when it comes to media planning
Insights
08.20.25
By: Stuart Bryan
A podcast titled Behavioural Science for Agencies: Media Planning has been doing the rounds at Guerillascope, and we think it’s worth blogging about.
Of particular interest has been Michael Aaron Flicker and Richar…
Original Research
Adam Alter
· Original study ↗
Methodology
Study cited from Adam Alter on 'nine-enders' and life-stage receptiveness
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
nine-enders (people aged 29, 39, etc.): 48% marathon participation likelihood. Source: Adam Alter (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/nine-enders-marathon-48-percent
HTML Embed
<blockquote cite="https://lighthousedata.io/data/nine-enders-marathon-48-percent" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>48%</strong> -- marathon participation likelihood for nine-enders (people aged 29, 39, etc.)<br><small>Source: Adam Alter (2025) · <a href="https://lighthousedata.io/data/nine-enders-marathon-48-percent" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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