Documents / Report
This is Project Blue Book Special Report No. 14, "Analysis of Reports of Unidentified Aerial Objects," Project No. 10073, dated 5 May 1955. The study reduced about 4,000 sighting reports received by the U.S. Air Force between June 1947 and December 1952 to IBM punched cards and analyzed them statistically, including chi square tests comparing knowns with unknowns. It concludes that the reports very probably do not represent technological developments beyond present scientific knowledge, and it notes that no case produced physical evidence.
“Jet Propulsion Laboratory”1 page
Evilalioa 0*£ Nunber Certain to? 17* n^SO &£. fs Doubtful /It' 20* ?#? /f /0 r f zv Total ?1f i$ ttt / / ? m- Nuaber ;ertan / / 2s / $ • 2 0 /7 / _^£ _4_ 13 Ooubtful /0 i f 3 S 0 a 0 0 7 &0 ToUl f / 't s s~ p '7 / / 00 4.0 00 6 0 0.0 it* Wf-' 00 00 / / / /i pf JZ /00. Evaluation 0-Balloon l-Astnranical 2-Aitcnft 3-litftPtwnon. «-BiRb 5-Clouds, Dust, etc S-lnsilfic Into. 7-Psydntofical IMMmow W i d e r ' Total Number Certain 0 J4~ _£_ - # - H9 Doubtful / f (? a_ .O O.o 00 ile. .16 Doubtfu * / ^ f £T.3 aO 00 01? 0fi 00 0 /•2> no £$ • Number Certain _x /^If / 0 .&- i¥ / JL S- S£ Doubtful f / / I? 0 / Total / / ?e i/ z f Percent Certain LL i3.1 a.i 0.O JU 0.S 27.$ .Z S3 /to Ntnber Certain Daubtfu Total Percent Certain Doubtful Tol.l 1 108
Report, cited by the archive. The PDF is mirrored here; the original link is under it. 309 pages are in the text index: search them above, or from the library's search.