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.
Evaluation 0- Balloon 1-Astronomical 7-Aitciitt 3-Lignt Phenom. «-Bud$ 5-Clouds, Oust, etc frlnsufric. * * > . 7-Piy rtoloji a l 1-UnluioMi 9-Otfiei Total Certain o o c c 0 • • i a / 0 Numbw rDoubttuJ C • > 0 o r o ^ o Q [Jotal / h 0 c 0 Percent Certain 7 7 73 I Q-0 at e.j IS-H l5Jt 71.1 Doubtful Total 0. 0\ 7.7 ?3./ 0.0 aJ o.n Q 0.0 -Ml Co O.o tt-2 Total 6.1 14.1 33/ IX It op 12-2 '2 2f tpO- f 1 Evaluation 0-Balloon l*Astroooniical 2-Airciaft ;3-Li£ht Phenom. 4-Birds S-Clouds, Oust, etc '6-lnsuflic Into. ! 7-Psycholojical B-UnluWM 9-OttlH Total Evaluation 0-BaMoon I-Astimomical 2-Airciaft 3-Lifht Pfienom. t-Binh 5-Clouds, Dust, etc 6-lnwflic. t i h . 7-P5ycholo|ical 8-Unkno«n 9-O0t« Total l/4K Numbei Certain / / • 4 If 3 % ^_ - • lO -A. 63 Doubtfu 1 -> >9 D - $ 1 16 Total /I It, -21. 0 '6 „' tc 1 77 Certain HI 3.8 CO 7' t?i PerCent Doubtfu 1 2 2-5 '3 1 0-O 0-0 fio .D 0$ ft.3 Total in 2 o-l 20.3 Total /'f *\0 23. ( Ol 00 fit ft-* 2J_ JJJ. 9/ *>£-/?> Numbei Certain 3 £ .3 Q 1 c q 0 -LL 10 Doubtful f 9 f 1 o 0 0 1 V Total ' 2 If in _x_ %i_ 0 II 3 (cl Pei Cent Certain H.I 18 f.f to PO CC 0.0 WO '3.3 Hi Doubtful IV.& n./ Iff 3-3 !•(. dp 6,0 a? !•(, fo,8 Total 191 1-11 3.3 3.2 (•(> JL6. Q.O IS 0 99 lot. ;ertain if &s // 1 / lUt // m. Number Doubtful ? f / I O sp 1 14/ A/c Total /Of -]& 111 15 H (1 13 /Cfl / ? at, Numbei Certain z £ 3 2 . 0 if 1 !£. JL Doubtful s 1A 2-5 /€•¥ 2.8 C9.3 PeiCent Doubtful // o 15- /. 5" 0.0 1-3 0.3 #£> 1-2 30-7 Total 72-0 /fi4 11.8 3-0 f-z If. 4 4.0 119. .£?& e E-j^r *£•/? Number Certain 0 i _L 3 0 3 Doubtfu 2 S /» $ 0 D 0 n Total / / / / ; 3 o ii 3 f a Certain O.O l'tf-3 2M 2-4 ao 0.0 1-1 9-0 71-2 11 59.5 Pei Cent Doubtful H-8 tt.g 6,0 CO 0.0 o.p 0.0 £?•£> 0.0 ¥o.S Total Lf-8 2Cl Z 4 0,v O.o 1.1 QO 77 109. 129
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.