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.
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/)99 Enluation 0- Balloon 1-Astronomical 2-Aircraft 3-Light Phenom. 4-Birds S-Clouds, Dust, etc 6-lnsufiic Info. 7-Psrcho logical S-Unkmmn 9-0 the. Total Number Certain / 0 0 0 0 0 // Doubtful 0 0 Total 0 3 1 0 0 0 0 o o c> Per Cent Certain O'O 0.1 0.1 to -£& 0.0 JLS. JM Ooubtlul o.o 54,6 o.O IP 0.0 0.0 00 OJ Total fi.L 75T.0 29,0 0.0 Oo 04 00 (.0 OJ 1(0. //-30 Sjrtf/v&j Number > r t » n a a / a 7 Doubtful / 0 d 0 0 0 a o0 3 Total / z. J- 0 0 0 I 0 p /a Per Cent Certain 0.0 30A JA M /(3.0 Od /a.o oo TOD Doubtful J0d_ 0.0 2LL O-o 0J 0.1 OP 0.D 0.0 at LTotal /t.o 2V.0 ft.O 0.0 o.t 0.0 /flf, 0 0 /to to /ot. y/-j0 SF^OA'P; Number Certain 0 ^ o a 2 ' > 7 Doubtful J 0 n d 0 0 o o 6 7 Total / 2 0 0 0 o p 3 1 9 Percent Certain Ml ao P.D 0.0 to 0.0 115 77.2 Doubtful O-O 0.0 - oj o.o 00 0.0 (?-0 0-0 0.0 Total / / / i.O 0J f,0 0.0 O.O n'J /tt. Evaluation O-Balloon 1-Astronomical 2-Aircraft 3-Light Phenom. 4-Birds 5-Clouds, Oust, etc 6-lnsuffic Info. 7-Psychological 8-UnknoM 3-Other Total Evaluation O-Balloon 1-Astronomical 2-Aircraft 3-Lighl Phenom. 4-Birds S-Clouds, Dust, etc S-lnsutfic Info. 7-Psychological 8-Unknonn 9-Ottier Total 6/ S£-covp5- S'/^/jycrfs- Number Certain 0 0.0 0,0 13 n /so. Number :ertain 0 0 o o 8 Doubtful 0 0 0 0 o 0 0 1 Total 3 3 0 0 o 0 f p 2 0 r PerCent Certain 333 3Z2 J± 0.0 0.0 ILL 0.0 if Doubtful 0.0 l/.f 0.0 o.o o.o A0 0.0 00 0.0 o.o // / Total 33.3 0.0 0.0 0.0 0.0 / / / 0.0 22.1 0.0 /00. Number Certain £^ 0 ~^\ _^£_ -JL Doubtfu 3 O O o ft a 8 Total # • /?- t 0 0 PerCent Certain tc.7 J0 04 0.0 0.0 O.Q 00 Total o.o qO.Q 20.0 6.0 00 00 04 00 40.0 0-0 m. //-30? S^^^MCJ Number Certain a £ a o o / • r Doubtful ^ 0 0 o / a o 0 o 1 Total 0 2. Z P / 0 0 0 0 e, PerCent Certain ~w 221 0.0 Jl 0-0 t.o 0.0 Doubtful Off 0.0 0.0 o.o /t-7 00 0JO t.o o-o 0,0 16-7 Total 0.0 33,3 o.o /il OJ U /(•I 9-9 /to. Number Certain 0 •2 0 a 0 0 i Doubtfu o /£ o 0 O a 0 0 0 Total 0 1 H D 0 0 0 0 /> J- Per Cent Certain OJ? 0.0 0.P 0.0 00 00 JJL 00 0.0 Doubtful 0.O •70-0 30. i 0.0 o& 0.0 0,0 0.0 0.0 fan Total 0.0 QH.O 9,00 OO O-o 0.0 0.0 00 0.0 t.o III- Evaluation O-Balloon 1-Astronomical 2-Aircraft 3-Lighl Phenom. 4-Birds S-Clouds, Dust, etc 6-lnsuffic Into. 7-Psydnlogical S-UnknoM W t h e t Total 6/ -SE-CMCS - S'A/.-Avrtrs Number Ceitain O -JL a o 0 / g A. Doubtful / / / / O 0 0 0 0 5 Total 3 / if 1 0 0 I / P j_ J./ PerCent Certain ?•'? O.O •00 0.9 •Off o.o 1%/ 7CA Doubtful f.i U 1-? 0.0 o.O 0.6 0.0 0.0 Total mHI 11.\ H-l on 00 #•? n w n i/ii. 6 ~3 0 /ty/Af&f'£s Number ;ertam •3 -A. 0 0 / 0 3 Doubtful a / 3 0 0 0 o 0 0 0 ¥ Total X 5~ 0 & 0 / 0 If r Percent Certain /o.i t£l o.o 0.0 6.0 JL2. 0.0 2/.I ftp 7H Doubtful o.o s-i / 33. f csr 7-2 4 0 OO 111 I? t-l /(P. 163
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.